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  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
  25  *
  26  **/
  27
  28 #include "rsync.h"
  29
  30 extern struct stats stats;
  31
  32 extern int verbose;
  33 extern int do_progress;
  34 extern int am_root;
  35 extern int am_server;
  36 extern int am_daemon;
  37 extern int always_checksum;
  38 extern int module_id;
  39 extern int ignore_errors;
  40 extern int numeric_ids;
  41
  42 extern int cvs_exclude;
  43
  44 extern int recurse;
  45 extern char curr_dir[MAXPATHLEN];
  46 extern char *files_from;
  47 extern int filesfrom_fd;
  48
  49 extern int one_file_system;
  50 extern int preserve_links;
  51 extern int preserve_hard_links;
  52 extern int preserve_perms;
  53 extern int preserve_devices;
  54 extern int preserve_uid;
  55 extern int preserve_gid;
  56 extern int preserve_times;
  57 extern int relative_paths;
  58 extern int implied_dirs;
  59 extern int copy_links;
  60 extern int copy_unsafe_links;
  61 extern int protocol_version;
  62 extern int sanitize_paths;
  63
  64 extern int read_batch;
  65 extern int write_batch;
  66
  67 extern struct exclude_struct **exclude_list;
  68 extern struct exclude_struct **server_exclude_list;
  69 extern struct exclude_struct **local_exclude_list;
  70
  71 int io_error;
  72
  73 static char empty_sum[MD4_SUM_LENGTH];
  74 static unsigned int file_struct_len;
  75
  76 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  77 static void output_flist(struct file_list *flist);
  78
  79 void init_flist(void)
  80 {
  81         struct file_struct f;
  82
  83         /* Figure out how big the file_struct is without trailing padding */
  84         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
  85 }
  86
  87
  88 static int show_filelist_p(void)
  89 {
  90         return verbose && (recurse || files_from) && !am_server;
  91 }
  92
  93 static void start_filelist_progress(char *kind)
  94 {
  95         rprintf(FINFO, "%s ... ", kind);
  96         if ((verbose > 1) || do_progress)
  97                 rprintf(FINFO, "\n");
  98         rflush(FINFO);
  99 }
 100
 101
 102 static void emit_filelist_progress(const struct file_list *flist)
 103 {
 104         rprintf(FINFO, " %d files...\r", flist->count);
 105 }
 106
 107
 108 static void maybe_emit_filelist_progress(const struct file_list *flist)
 109 {
 110         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 111                 emit_filelist_progress(flist);
 112 }
 113
 114
 115 static void finish_filelist_progress(const struct file_list *flist)
 116 {
 117         if (do_progress) {
 118                 /* This overwrites the progress line */
 119                 rprintf(FINFO, "%d file%sto consider\n",
 120                         flist->count, flist->count == 1 ? " " : "s ");
 121         } else
 122                 rprintf(FINFO, "done\n");
 123 }
 124
 125 void show_flist_stats(void)
 126 {
 127         /* Nothing yet */
 128 }
 129
 130
 131 static void list_file_entry(struct file_struct *f)
 132 {
 133         char perms[11];
 134
 135         if (!f->basename)
 136                 /* this can happen if duplicate names were removed */
 137                 return;
 138
 139         permstring(perms, f->mode);
 140
 141 #if SUPPORT_LINKS
 142         if (preserve_links && S_ISLNK(f->mode)) {
 143                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 144                         perms,
 145                         (double) f->length, timestring(f->modtime),
 146                         f_name(f), f->u.link);
 147         } else
 148 #endif
 149                 rprintf(FINFO, "%s %11.0f %s %s\n",
 150                         perms,
 151                         (double) f->length, timestring(f->modtime),
 152                         f_name(f));
 153 }
 154
 155
 156 /**
 157  * Stat either a symlink or its referent, depending on the settings of
 158  * copy_links, copy_unsafe_links, etc.
 159  *
 160  * @retval -1 on error
 161  *
 162  * @retval 0 for success
 163  *
 164  * @post If @p path is a symlink, then @p linkbuf (of size @c
 165  * MAXPATHLEN) contains the symlink target.
 166  *
 167  * @post @p buffer contains information about the link or the
 168  * referrent as appropriate, if they exist.
 169  **/
 170 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 171 {
 172 #if SUPPORT_LINKS
 173         if (copy_links)
 174                 return do_stat(path, buffer);
 175         if (do_lstat(path, buffer) == -1)
 176                 return -1;
 177         if (S_ISLNK(buffer->st_mode)) {
 178                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 179                 if (l == -1)
 180                         return -1;
 181                 linkbuf[l] = 0;
 182                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 183                         if (verbose > 1) {
 184                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 185                                         path, linkbuf);
 186                         }
 187                         return do_stat(path, buffer);
 188                 }
 189         }
 190         return 0;
 191 #else
 192         return do_stat(path, buffer);
 193 #endif
 194 }
 195
 196 int link_stat(const char *path, STRUCT_STAT * buffer)
 197 {
 198 #if SUPPORT_LINKS
 199         if (copy_links)
 200                 return do_stat(path, buffer);
 201         return do_lstat(path, buffer);
 202 #else
 203         return do_stat(path, buffer);
 204 #endif
 205 }
 206
 207 /*
 208  * This function is used to check if a file should be included/excluded
 209  * from the list of files based on its name and type etc.  The value of
 210  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 211  */
 212 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 213 {
 214 #if 0 /* This currently never happens, so avoid a useless compare. */
 215         if (exclude_level == NO_EXCLUDES)
 216                 return 0;
 217 #endif
 218         if (fname) {
 219                 /* never exclude '.', even if somebody does --exclude '*' */
 220                 if (fname[0] == '.' && !fname[1])
 221                         return 0;
 222                 /* Handle the -R version of the '.' dir. */
 223                 if (fname[0] == '/') {
 224                         int len = strlen(fname);
 225                         if (fname[len-1] == '.' && fname[len-2] == '/')
 226                                 return 0;
 227                 }
 228         }
 229         if (server_exclude_list
 230          && check_exclude(server_exclude_list, fname, is_dir))
 231                 return 1;
 232         if (exclude_level != ALL_EXCLUDES)
 233                 return 0;
 234         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 235                 return 1;
 236         if (local_exclude_list
 237          && check_exclude(local_exclude_list, fname, is_dir))
 238                 return 1;
 239         return 0;
 240 }
 241
 242 /* used by the one_file_system code */
 243 static dev_t filesystem_dev;
 244
 245 static void set_filesystem(char *fname)
 246 {
 247         STRUCT_STAT st;
 248         if (link_stat(fname, &st) != 0)
 249                 return;
 250         filesystem_dev = st.st_dev;
 251 }
 252
 253
 254 static int to_wire_mode(mode_t mode)
 255 {
 256 #if SUPPORT_LINKS
 257         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 258                 return (mode & ~(_S_IFMT)) | 0120000;
 259 #endif
 260         return (int) mode;
 261 }
 262
 263 static mode_t from_wire_mode(int mode)
 264 {
 265         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 266                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 267         return (mode_t) mode;
 268 }
 269
 270
 271 static void send_directory(int f, struct file_list *flist, char *dir);
 272
 273 static char *flist_dir;
 274 static int flist_dir_len;
 275
 276
 277 /**
 278  * Make sure @p flist is big enough to hold at least @p flist->count
 279  * entries.
 280  **/
 281 void flist_expand(struct file_list *flist)
 282 {
 283         void *new_ptr;
 284
 285         if (flist->count < flist->malloced)
 286                 return;
 287
 288         if (flist->malloced < FLIST_START)
 289                 flist->malloced = FLIST_START;
 290         else if (flist->malloced >= FLIST_LINEAR)
 291                 flist->malloced += FLIST_LINEAR;
 292         else
 293                 flist->malloced *= 2;
 294
 295         /*
 296          * In case count jumped or we are starting the list
 297          * with a known size just set it.
 298          */
 299         if (flist->malloced < flist->count)
 300                 flist->malloced = flist->count;
 301
 302         if (flist->files) {
 303                 new_ptr = realloc_array(flist->files,
 304                     struct file_struct *, flist->malloced);
 305         } else {
 306                 new_ptr = new_array(struct file_struct *, flist->malloced);
 307         }
 308
 309         if (verbose >= 2) {
 310                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 311                     who_am_i(),
 312                     (double) sizeof flist->files[0] * flist->malloced,
 313                     (new_ptr == flist->files) ? " not" : "");
 314         }
 315
 316         flist->files = (struct file_struct **) new_ptr;
 317
 318         if (!flist->files)
 319                 out_of_memory("flist_expand");
 320 }
 321
 322 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 323 {
 324         unsigned short flags;
 325         static time_t modtime;
 326         static mode_t mode;
 327         static dev_t dev, rdev;
 328         static uint32 rdev_major;
 329         static uid_t uid;
 330         static gid_t gid;
 331         static char lastname[MAXPATHLEN];
 332         char *fname, fbuf[MAXPATHLEN];
 333         int l1, l2;
 334
 335         if (f == -1)
 336                 return;
 337
 338         if (!file) {
 339                 write_byte(f, 0);
 340                 modtime = 0, mode = 0;
 341                 dev = rdev = makedev(0, 0);
 342                 rdev_major = 0;
 343                 uid = 0, gid = 0;
 344                 *lastname = '\0';
 345                 return;
 346         }
 347
 348         io_write_phase = "send_file_entry";
 349
 350         fname = f_name_to(file, fbuf);
 351
 352         flags = base_flags;
 353
 354         if (file->mode == mode)
 355                 flags |= XMIT_SAME_MODE;
 356         else
 357                 mode = file->mode;
 358         if (preserve_devices) {
 359                 if (protocol_version < 28) {
 360                         if (IS_DEVICE(mode)) {
 361                                 if (file->u.rdev == rdev)
 362                                         flags |= XMIT_SAME_RDEV_pre28;
 363                                 else
 364                                         rdev = file->u.rdev;
 365                         } else
 366                                 rdev = makedev(0, 0);
 367                 } else if (IS_DEVICE(mode)) {
 368                         rdev = file->u.rdev;
 369                         if ((uint32)major(rdev) == rdev_major)
 370                                 flags |= XMIT_SAME_RDEV_MAJOR;
 371                         else
 372                                 rdev_major = major(rdev);
 373                         if ((uint32)minor(rdev) <= 0xFFu)
 374                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 375                 }
 376         }
 377         if (file->uid == uid)
 378                 flags |= XMIT_SAME_UID;
 379         else
 380                 uid = file->uid;
 381         if (file->gid == gid)
 382                 flags |= XMIT_SAME_GID;
 383         else
 384                 gid = file->gid;
 385         if (file->modtime == modtime)
 386                 flags |= XMIT_SAME_TIME;
 387         else
 388                 modtime = file->modtime;
 389
 390 #if SUPPORT_HARD_LINKS
 391         if (file->link_u.idev) {
 392                 if (file->F_DEV == dev) {
 393                         if (protocol_version >= 28)
 394                                 flags |= XMIT_SAME_DEV;
 395                 } else
 396                         dev = file->F_DEV;
 397                 flags |= XMIT_HAS_IDEV_DATA;
 398         }
 399 #endif
 400
 401         for (l1 = 0;
 402             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 403             l1++) {}
 404         l2 = strlen(fname+l1);
 405
 406         if (l1 > 0)
 407                 flags |= XMIT_SAME_NAME;
 408         if (l2 > 255)
 409                 flags |= XMIT_LONG_NAME;
 410
 411         /* We must make sure we don't send a zero flag byte or the
 412          * other end will terminate the flist transfer.  Note that
 413          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 414          * it's harmless way to add a bit to the first flag byte. */
 415         if (protocol_version >= 28) {
 416                 if (!flags && !S_ISDIR(mode))
 417                         flags |= XMIT_TOP_DIR;
 418                 if ((flags & 0xFF00) || !flags) {
 419                         flags |= XMIT_EXTENDED_FLAGS;
 420                         write_byte(f, flags);
 421                         write_byte(f, flags >> 8);
 422                 } else
 423                         write_byte(f, flags);
 424         } else {
 425                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 426                         flags |= XMIT_TOP_DIR;
 427                 if (!(flags & 0xFF))
 428                         flags |= XMIT_LONG_NAME;
 429                 write_byte(f, flags);
 430         }
 431         if (flags & XMIT_SAME_NAME)
 432                 write_byte(f, l1);
 433         if (flags & XMIT_LONG_NAME)
 434                 write_int(f, l2);
 435         else
 436                 write_byte(f, l2);
 437         write_buf(f, fname + l1, l2);
 438
 439         write_longint(f, file->length);
 440         if (!(flags & XMIT_SAME_TIME))
 441                 write_int(f, modtime);
 442         if (!(flags & XMIT_SAME_MODE))
 443                 write_int(f, to_wire_mode(mode));
 444         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 445                 if (!numeric_ids)
 446                         add_uid(uid);
 447                 write_int(f, uid);
 448         }
 449         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 450                 if (!numeric_ids)
 451                         add_gid(gid);
 452                 write_int(f, gid);
 453         }
 454         if (preserve_devices && IS_DEVICE(mode)) {
 455                 if (protocol_version < 28) {
 456                         if (!(flags & XMIT_SAME_RDEV_pre28))
 457                                 write_int(f, (int)rdev);
 458                 } else {
 459                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 460                                 write_int(f, major(rdev));
 461                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 462                                 write_byte(f, minor(rdev));
 463                         else
 464                                 write_int(f, minor(rdev));
 465                 }
 466         }
 467
 468 #if SUPPORT_LINKS
 469         if (preserve_links && S_ISLNK(mode)) {
 470                 int len = strlen(file->u.link);
 471                 write_int(f, len);
 472                 write_buf(f, file->u.link, len);
 473         }
 474 #endif
 475
 476 #if SUPPORT_HARD_LINKS
 477         if (flags & XMIT_HAS_IDEV_DATA) {
 478                 if (protocol_version >= 28) {
 479                         /* major/minor dev_t and 64-bit ino_t */
 480                         if (!(flags & XMIT_SAME_DEV)) {
 481                                 write_int(f, major(dev));
 482                                 write_int(f, minor(dev));
 483                         }
 484                         write_longint(f, file->F_INODE);
 485                 } else if (protocol_version < 26) {
 486                         /* 32-bit dev_t and ino_t */
 487                         write_int(f, dev);
 488                         write_int(f, file->F_INODE);
 489                 } else {
 490                         /* 64-bit dev_t and ino_t */
 491                         write_longint(f, dev);
 492                         write_longint(f, file->F_INODE);
 493                 }
 494         }
 495 #endif
 496
 497         if (always_checksum) {
 498                 char *sum;
 499                 if (S_ISREG(mode))
 500                         sum = file->u.sum;
 501                 else if (protocol_version < 28) {
 502                         /* Prior to 28, we sent a useless set of nulls. */
 503                         sum = empty_sum;
 504                 } else
 505                         sum = NULL;
 506                 if (sum) {
 507                         write_buf(f, sum,
 508                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 509                 }
 510         }
 511
 512         strlcpy(lastname, fname, MAXPATHLEN);
 513
 514         io_write_phase = "unknown";
 515 }
 516
 517
 518
 519 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 520     struct file_list *flist, int f)
 521 {
 522         static time_t modtime;
 523         static mode_t mode;
 524         static dev_t dev, rdev;
 525         static uint32 rdev_major;
 526         static uid_t uid;
 527         static gid_t gid;
 528         static char lastname[MAXPATHLEN], *lastdir;
 529         static int lastdir_len = -1;
 530         char thisname[MAXPATHLEN];
 531         unsigned int l1 = 0, l2 = 0;
 532         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 533         OFF_T file_length;
 534         char *basename, *dirname, *bp;
 535         struct file_struct *file;
 536
 537         if (!fptr) {
 538                 modtime = 0, mode = 0;
 539                 dev = rdev = makedev(0, 0);
 540                 rdev_major = 0;
 541                 uid = 0, gid = 0;
 542                 *lastname = '\0';
 543                 return;
 544         }
 545
 546         if (flags & XMIT_SAME_NAME)
 547                 l1 = read_byte(f);
 548
 549         if (flags & XMIT_LONG_NAME)
 550                 l2 = read_int(f);
 551         else
 552                 l2 = read_byte(f);
 553
 554         if (l2 >= MAXPATHLEN - l1) {
 555                 rprintf(FERROR,
 556                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 557                         flags, l1, l2, lastname);
 558                 overflow("receive_file_entry");
 559         }
 560
 561         strlcpy(thisname, lastname, l1 + 1);
 562         read_sbuf(f, &thisname[l1], l2);
 563         thisname[l1 + l2] = 0;
 564
 565         strlcpy(lastname, thisname, MAXPATHLEN);
 566
 567         clean_fname(thisname);
 568
 569         if (sanitize_paths)
 570                 sanitize_path(thisname, NULL);
 571
 572         if ((basename = strrchr(thisname, '/')) != NULL) {
 573                 dirname_len = ++basename - thisname; /* counts future '\0' */
 574                 if (lastdir_len == dirname_len - 1
 575                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 576                         dirname = lastdir;
 577                         dirname_len = 0; /* indicates no copy is needed */
 578                 } else
 579                         dirname = thisname;
 580         } else {
 581                 basename = thisname;
 582                 dirname = NULL;
 583                 dirname_len = 0;
 584         }
 585         basename_len = strlen(basename) + 1; /* count the '\0' */
 586
 587         file_length = read_longint(f);
 588         if (!(flags & XMIT_SAME_TIME))
 589                 modtime = (time_t)read_int(f);
 590         if (!(flags & XMIT_SAME_MODE))
 591                 mode = from_wire_mode(read_int(f));
 592
 593         if (preserve_uid && !(flags & XMIT_SAME_UID))
 594                 uid = (uid_t)read_int(f);
 595         if (preserve_gid && !(flags & XMIT_SAME_GID))
 596                 gid = (gid_t)read_int(f);
 597
 598         if (preserve_devices) {
 599                 if (protocol_version < 28) {
 600                         if (IS_DEVICE(mode)) {
 601                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 602                                         rdev = (dev_t)read_int(f);
 603                         } else
 604                                 rdev = makedev(0, 0);
 605                 } else if (IS_DEVICE(mode)) {
 606                         uint32 rdev_minor;
 607                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 608                                 rdev_major = read_int(f);
 609                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 610                                 rdev_minor = read_byte(f);
 611                         else
 612                                 rdev_minor = read_int(f);
 613                         rdev = makedev(rdev_major, rdev_minor);
 614                 }
 615         }
 616
 617 #if SUPPORT_LINKS
 618         if (preserve_links && S_ISLNK(mode)) {
 619                 linkname_len = read_int(f) + 1; /* count the '\0' */
 620                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 621                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 622                                 linkname_len - 1);
 623                         overflow("receive_file_entry");
 624                 }
 625         }
 626         else
 627 #endif
 628                 linkname_len = 0;
 629
 630         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 631
 632         alloc_len = file_struct_len + dirname_len + basename_len
 633                   + linkname_len + sum_len;
 634         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 635
 636         file = *fptr = (struct file_struct *)bp;
 637         memset(bp, 0, file_struct_len);
 638         bp += file_struct_len;
 639
 640         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 641         file->modtime = modtime;
 642         file->length = file_length;
 643         file->mode = mode;
 644         file->uid = uid;
 645         file->gid = gid;
 646
 647         if (dirname_len) {
 648                 file->dirname = lastdir = bp;
 649                 lastdir_len = dirname_len - 1;
 650                 memcpy(bp, dirname, dirname_len - 1);
 651                 bp += dirname_len;
 652                 bp[-1] = '\0';
 653         } else if (dirname)
 654                 file->dirname = dirname;
 655
 656         file->basename = bp;
 657         memcpy(bp, basename, basename_len);
 658         bp += basename_len;
 659
 660         if (preserve_devices && IS_DEVICE(mode))
 661                 file->u.rdev = rdev;
 662
 663 #if SUPPORT_LINKS
 664         if (linkname_len) {
 665                 file->u.link = bp;
 666                 read_sbuf(f, bp, linkname_len - 1);
 667                 if (sanitize_paths)
 668                         sanitize_path(bp, lastdir);
 669                 bp += linkname_len;
 670         }
 671 #endif
 672
 673 #if SUPPORT_HARD_LINKS
 674         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 675                 flags |= XMIT_HAS_IDEV_DATA;
 676         if (flags & XMIT_HAS_IDEV_DATA) {
 677                 INO64_T inode;
 678                 if (protocol_version >= 28) {
 679                         if (!(flags & XMIT_SAME_DEV)) {
 680                                 uint32 dev_major = read_int(f);
 681                                 uint32 dev_minor = read_int(f);
 682                                 dev = makedev(dev_major, dev_minor);
 683                         }
 684                         inode = read_longint(f);
 685                 } else if (protocol_version < 26) {
 686                         dev = (dev_t)read_int(f);
 687                         inode = read_int(f);
 688                 } else {
 689                         dev = (dev_t)read_longint(f);
 690                         inode = read_longint(f);
 691                 }
 692                 if (flist->hlink_pool) {
 693                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 694                             struct idev, 1, "inode_table");
 695                         file->F_INODE = inode;
 696                         file->F_DEV = dev;
 697                 }
 698         }
 699 #endif
 700
 701         if (always_checksum) {
 702                 char *sum;
 703                 if (sum_len) {
 704                         file->u.sum = sum = bp;
 705                         /*bp += sum_len;*/
 706                 } else if (protocol_version < 28) {
 707                         /* Prior to 28, we get a useless set of nulls. */
 708                         sum = empty_sum;
 709                 } else
 710                         sum = NULL;
 711                 if (sum) {
 712                         read_buf(f, sum,
 713                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 714                 }
 715         }
 716
 717         if (!preserve_perms) {
 718                 extern int orig_umask;
 719                 /* set an appropriate set of permissions based on original
 720                  * permissions and umask. This emulates what GNU cp does */
 721                 file->mode &= ~orig_umask;
 722         }
 723 }
 724
 725
 726 /**
 727  * Create a file_struct for a named file by reading its stat()
 728  * information and performing extensive checks against global
 729  * options.
 730  *
 731  * @return the new file, or NULL if there was an error or this file
 732  * should be excluded.
 733  *
 734  * @todo There is a small optimization opportunity here to avoid
 735  * stat()ing the file in some circumstances, which has a certain cost.
 736  * We are called immediately after doing readdir(), and so we may
 737  * already know the d_type of the file.  We could for example avoid
 738  * statting directories if we're not recursing, but this is not a very
 739  * important case.  Some systems may not have d_type.
 740  **/
 741 struct file_struct *make_file(char *fname,
 742     struct file_list *flist, int exclude_level)
 743 {
 744         static char *lastdir;
 745         static int lastdir_len = -1;
 746         struct file_struct *file;
 747         STRUCT_STAT st;
 748         char sum[SUM_LENGTH];
 749         char thisname[MAXPATHLEN];
 750         char linkname[MAXPATHLEN];
 751         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 752         char *basename, *dirname, *bp;
 753         unsigned short flags = 0;
 754
 755         if (!flist)     /* lastdir isn't valid if flist is NULL */
 756                 lastdir_len = -1;
 757
 758         if (strlcpy(thisname, fname, sizeof thisname)
 759             >= sizeof thisname - flist_dir_len) {
 760                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 761                 return NULL;
 762         }
 763         clean_fname(thisname);
 764         if (sanitize_paths)
 765                 sanitize_path(thisname, NULL);
 766
 767         memset(sum, 0, SUM_LENGTH);
 768
 769         if (readlink_stat(thisname, &st, linkname) != 0) {
 770                 int save_errno = errno;
 771                 if (errno == ENOENT) {
 772                         enum logcode c = am_daemon && protocol_version < 28
 773                             ? FERROR : FINFO;
 774                         /* either symlink pointing nowhere or file that
 775                          * was removed during rsync run; see if excluded
 776                          * before reporting an error */
 777                         if (exclude_level != NO_EXCLUDES
 778                             && check_exclude_file(thisname, 0, exclude_level)) {
 779                                 /* file is excluded anyway, ignore silently */
 780                                 return NULL;
 781                         }
 782                         io_error |= IOERR_VANISHED;
 783                         rprintf(c, "file has vanished: %s\n",
 784                             full_fname(thisname));
 785                 }
 786                 else {
 787                         io_error |= IOERR_GENERAL;
 788                         rprintf(FERROR, "readlink %s failed: %s\n",
 789                             full_fname(thisname), strerror(save_errno));
 790                 }
 791                 return NULL;
 792         }
 793
 794         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 795         if (exclude_level == NO_EXCLUDES)
 796                 goto skip_excludes;
 797
 798         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 799                 rprintf(FINFO, "skipping directory %s\n", thisname);
 800                 return NULL;
 801         }
 802
 803         /* We only care about directories because we need to avoid recursing
 804          * into a mount-point directory, not to avoid copying a symlinked
 805          * file if -L (or similar) was specified. */
 806         if (one_file_system && st.st_dev != filesystem_dev
 807             && S_ISDIR(st.st_mode))
 808                 flags |= FLAG_MOUNT_POINT;
 809
 810         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 811                 return NULL;
 812
 813         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 814                 return NULL;
 815
 816 skip_excludes:
 817
 818         if (verbose > 2) {
 819                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 820                         who_am_i(), thisname, exclude_level);
 821         }
 822
 823         if ((basename = strrchr(thisname, '/')) != NULL) {
 824                 dirname_len = ++basename - thisname; /* counts future '\0' */
 825                 if (lastdir_len == dirname_len - 1
 826                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 827                         dirname = lastdir;
 828                         dirname_len = 0; /* indicates no copy is needed */
 829                 } else
 830                         dirname = thisname;
 831         } else {
 832                 basename = thisname;
 833                 dirname = NULL;
 834                 dirname_len = 0;
 835         }
 836         basename_len = strlen(basename) + 1; /* count the '\0' */
 837
 838 #if SUPPORT_LINKS
 839         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 840 #else
 841         linkname_len = 0;
 842 #endif
 843
 844         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 845
 846         alloc_len = file_struct_len + dirname_len + basename_len
 847             + linkname_len + sum_len;
 848         if (flist) {
 849                 bp = pool_alloc(flist->file_pool, alloc_len,
 850                     "receive_file_entry");
 851         } else {
 852                 if (!(bp = new_array(char, alloc_len)))
 853                         out_of_memory("receive_file_entry");
 854         }
 855
 856         file = (struct file_struct *)bp;
 857         memset(bp, 0, file_struct_len);
 858         bp += file_struct_len;
 859
 860         file->flags = flags;
 861         file->modtime = st.st_mtime;
 862         file->length = st.st_size;
 863         file->mode = st.st_mode;
 864         file->uid = st.st_uid;
 865         file->gid = st.st_gid;
 866
 867 #if SUPPORT_HARD_LINKS
 868         if (flist && flist->hlink_pool) {
 869                 if (protocol_version < 28) {
 870                         if (S_ISREG(st.st_mode))
 871                                 file->link_u.idev = pool_talloc(
 872                                     flist->hlink_pool, struct idev, 1,
 873                                     "inode_table");
 874                 } else {
 875                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 876                                 file->link_u.idev = pool_talloc(
 877                                     flist->hlink_pool, struct idev, 1,
 878                                     "inode_table");
 879                 }
 880         }
 881         if (file->link_u.idev) {
 882                 file->F_DEV = st.st_dev;
 883                 file->F_INODE = st.st_ino;
 884         }
 885 #endif
 886
 887         if (dirname_len) {
 888                 file->dirname = lastdir = bp;
 889                 lastdir_len = dirname_len - 1;
 890                 memcpy(bp, dirname, dirname_len - 1);
 891                 bp += dirname_len;
 892                 bp[-1] = '\0';
 893         } else if (dirname)
 894                 file->dirname = dirname;
 895
 896         file->basename = bp;
 897         memcpy(bp, basename, basename_len);
 898         bp += basename_len;
 899
 900 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 901         if (preserve_devices && IS_DEVICE(st.st_mode))
 902                 file->u.rdev = st.st_rdev;
 903 #endif
 904
 905 #if SUPPORT_LINKS
 906         if (linkname_len) {
 907                 file->u.link = bp;
 908                 memcpy(bp, linkname, linkname_len);
 909                 bp += linkname_len;
 910         }
 911 #endif
 912
 913         if (sum_len) {
 914                 file->u.sum = bp;
 915                 file_checksum(thisname, bp, st.st_size);
 916                 /*bp += sum_len;*/
 917         }
 918
 919         file->basedir = flist_dir;
 920
 921         if (!S_ISDIR(st.st_mode))
 922                 stats.total_size += st.st_size;
 923
 924         return file;
 925 }
 926
 927
 928 void send_file_name(int f, struct file_list *flist, char *fname,
 929                     int recursive, unsigned short base_flags)
 930 {
 931         struct file_struct *file;
 932         char fbuf[MAXPATHLEN];
 933         extern int delete_excluded;
 934
 935         /* f is set to -1 when calculating deletion file list */
 936         file = make_file(fname, flist,
 937             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 938
 939         if (!file)
 940                 return;
 941
 942         maybe_emit_filelist_progress(flist);
 943
 944         flist_expand(flist);
 945
 946         if (write_batch)
 947                 file->flags |= FLAG_TOP_DIR;
 948
 949         if (file->basename[0]) {
 950                 flist->files[flist->count++] = file;
 951                 send_file_entry(file, f, base_flags);
 952         }
 953
 954         if (recursive && S_ISDIR(file->mode)
 955             && !(file->flags & FLAG_MOUNT_POINT)) {
 956                 struct exclude_struct **last_exclude_list = local_exclude_list;
 957                 send_directory(f, flist, f_name_to(file, fbuf));
 958                 local_exclude_list = last_exclude_list;
 959                 return;
 960         }
 961 }
 962
 963
 964 static void send_directory(int f, struct file_list *flist, char *dir)
 965 {
 966         DIR *d;
 967         struct dirent *di;
 968         char fname[MAXPATHLEN];
 969         unsigned int offset;
 970         char *p;
 971
 972         d = opendir(dir);
 973         if (!d) {
 974                 io_error |= IOERR_GENERAL;
 975                 rprintf(FERROR, "opendir %s failed: %s\n",
 976                         full_fname(dir), strerror(errno));
 977                 return;
 978         }
 979
 980         offset = strlcpy(fname, dir, MAXPATHLEN);
 981         p = fname + offset;
 982         if (offset >= MAXPATHLEN || p[-1] != '/') {
 983                 if (offset >= MAXPATHLEN - 1) {
 984                         io_error |= IOERR_GENERAL;
 985                         rprintf(FERROR, "skipping long-named directory: %s\n",
 986                                 full_fname(fname));
 987                         closedir(d);
 988                         return;
 989                 }
 990                 *p++ = '/';
 991                 offset++;
 992         }
 993
 994         local_exclude_list = NULL;
 995
 996         if (cvs_exclude) {
 997                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 998                     < MAXPATHLEN - offset) {
 999                         add_exclude_file(&local_exclude_list, fname,
1000                                          MISSING_OK, ADD_EXCLUDE);
1001                 } else {
1002                         io_error |= IOERR_GENERAL;
1003                         rprintf(FINFO,
1004                                 "cannot cvs-exclude in long-named directory %s\n",
1005                                 full_fname(fname));
1006                 }
1007         }
1008
1009         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1010                 char *dname = d_name(di);
1011                 if (dname[0] == '.' && (dname[1] == '\0'
1012                     || (dname[1] == '.' && dname[2] == '\0')))
1013                         continue;
1014                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1015                         send_file_name(f, flist, fname, recurse, 0);
1016                 else {
1017                         io_error |= IOERR_GENERAL;
1018                         rprintf(FINFO,
1019                                 "cannot send long-named file %s\n",
1020                                 full_fname(fname));
1021                 }
1022         }
1023         if (errno) {
1024                 io_error |= IOERR_GENERAL;
1025                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1026                         dir, errno, strerror(errno));
1027         }
1028
1029         if (local_exclude_list)
1030                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1031
1032         closedir(d);
1033 }
1034
1035
1036 /**
1037  * The delete_files() function in receiver.c sets f to -1 so that we just
1038  * construct the file list in memory without sending it over the wire.  It
1039  * also has the side-effect of ignoring user-excludes if delete_excluded
1040  * is set (so that the delete list includes user-excluded files).
1041  **/
1042 struct file_list *send_file_list(int f, int argc, char *argv[])
1043 {
1044         int l;
1045         STRUCT_STAT st;
1046         char *p, *dir, olddir[sizeof curr_dir];
1047         char lastpath[MAXPATHLEN] = "";
1048         struct file_list *flist;
1049         int64 start_write;
1050         int use_ff_fd = 0;
1051
1052         if (show_filelist_p() && f != -1)
1053                 start_filelist_progress("building file list");
1054
1055         start_write = stats.total_written;
1056
1057         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1058             "send_file_list");
1059
1060         if (f != -1) {
1061                 io_start_buffering_out(f);
1062                 if (filesfrom_fd >= 0) {
1063                         if (argv[0] && !push_dir(argv[0])) {
1064                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1065                                         full_fname(argv[0]), strerror(errno));
1066                                 exit_cleanup(RERR_FILESELECT);
1067                         }
1068                         use_ff_fd = 1;
1069                 }
1070         }
1071
1072         while (1) {
1073                 char fname2[MAXPATHLEN];
1074                 char *fname = fname2;
1075
1076                 if (use_ff_fd) {
1077                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1078                                 break;
1079                         sanitize_path(fname, NULL);
1080                 } else {
1081                         if (argc-- == 0)
1082                                 break;
1083                         strlcpy(fname, *argv++, MAXPATHLEN);
1084                         if (sanitize_paths)
1085                                 sanitize_path(fname, NULL);
1086                 }
1087
1088                 l = strlen(fname);
1089                 if (fname[l - 1] == '/') {
1090                         if (l == 2 && fname[0] == '.') {
1091                                 /* Turn "./" into just "." rather than "./." */
1092                                 fname[1] = '\0';
1093                         } else if (l < MAXPATHLEN) {
1094                                 fname[l++] = '.';
1095                                 fname[l] = '\0';
1096                         }
1097                 }
1098
1099                 if (link_stat(fname, &st) != 0) {
1100                         if (f != -1) {
1101                                 io_error |= IOERR_GENERAL;
1102                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1103                                         full_fname(fname), strerror(errno));
1104                         }
1105                         continue;
1106                 }
1107
1108                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1109                         rprintf(FINFO, "skipping directory %s\n", fname);
1110                         continue;
1111                 }
1112
1113                 dir = NULL;
1114                 olddir[0] = '\0';
1115
1116                 if (!relative_paths) {
1117                         p = strrchr(fname, '/');
1118                         if (p) {
1119                                 *p = 0;
1120                                 if (p == fname)
1121                                         dir = "/";
1122                                 else
1123                                         dir = fname;
1124                                 fname = p + 1;
1125                         }
1126                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1127                         /* this ensures we send the intermediate directories,
1128                            thus getting their permissions right */
1129                         char *lp = lastpath, *fn = fname, *slash = fname;
1130                         *p = 0;
1131                         /* Skip any initial directories in our path that we
1132                          * have in common with lastpath. */
1133                         while (*fn && *lp == *fn) {
1134                                 if (*fn == '/')
1135                                         slash = fn;
1136                                 lp++, fn++;
1137                         }
1138                         *p = '/';
1139                         if (fn != p || (*lp && *lp != '/')) {
1140                                 int copy_links_saved = copy_links;
1141                                 int recurse_saved = recurse;
1142                                 copy_links = copy_unsafe_links;
1143                                 /* set recurse to 1 to prevent make_file
1144                                  * from ignoring directory, but still
1145                                  * turn off the recursive parameter to
1146                                  * send_file_name */
1147                                 recurse = 1;
1148                                 while ((slash = strchr(slash+1, '/')) != 0) {
1149                                         *slash = 0;
1150                                         send_file_name(f, flist, fname, 0, 0);
1151                                         *slash = '/';
1152                                 }
1153                                 copy_links = copy_links_saved;
1154                                 recurse = recurse_saved;
1155                                 *p = 0;
1156                                 strlcpy(lastpath, fname, sizeof lastpath);
1157                                 *p = '/';
1158                         }
1159                 }
1160
1161                 if (!*fname)
1162                         fname = ".";
1163
1164                 if (dir && *dir) {
1165                         static char *lastdir;
1166                         static int lastdir_len;
1167
1168                         strcpy(olddir, curr_dir); /* can't overflow */
1169
1170                         if (!push_dir(dir)) {
1171                                 io_error |= IOERR_GENERAL;
1172                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1173                                         full_fname(dir), strerror(errno));
1174                                 continue;
1175                         }
1176
1177                         if (lastdir && strcmp(lastdir, dir) == 0) {
1178                                 flist_dir = lastdir;
1179                                 flist_dir_len = lastdir_len;
1180                         } else {
1181                                 flist_dir = lastdir = strdup(dir);
1182                                 flist_dir_len = lastdir_len = strlen(dir);
1183                         }
1184                 }
1185
1186                 if (one_file_system)
1187                         set_filesystem(fname);
1188
1189                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1190
1191                 if (olddir[0]) {
1192                         flist_dir = NULL;
1193                         flist_dir_len = 0;
1194                         if (!pop_dir(olddir)) {
1195                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1196                                         full_fname(dir), strerror(errno));
1197                                 exit_cleanup(RERR_FILESELECT);
1198                         }
1199                 }
1200         }
1201
1202         if (f != -1) {
1203                 send_file_entry(NULL, f, 0);
1204
1205                 if (show_filelist_p())
1206                         finish_filelist_progress(flist);
1207         }
1208
1209         if (flist->hlink_pool) {
1210                 pool_destroy(flist->hlink_pool);
1211                 flist->hlink_pool = NULL;
1212         }
1213
1214         clean_flist(flist, 0, 0);
1215
1216         if (f != -1) {
1217                 /* Now send the uid/gid list. This was introduced in
1218                  * protocol version 15 */
1219                 send_uid_list(f);
1220
1221                 /* send the io_error flag */
1222                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1223
1224                 io_end_buffering();
1225                 stats.flist_size = stats.total_written - start_write;
1226                 stats.num_files = flist->count;
1227                 if (write_batch)
1228                         write_batch_flist_info(flist->count, flist->files);
1229         }
1230
1231         if (verbose > 3)
1232                 output_flist(flist);
1233
1234         if (verbose > 2)
1235                 rprintf(FINFO, "send_file_list done\n");
1236
1237         return flist;
1238 }
1239
1240
1241 struct file_list *recv_file_list(int f)
1242 {
1243         struct file_list *flist;
1244         unsigned short flags;
1245         int64 start_read;
1246         extern int list_only;
1247
1248         if (show_filelist_p())
1249                 start_filelist_progress("receiving file list");
1250
1251         start_read = stats.total_read;
1252
1253         flist = flist_new(WITH_HLINK, "recv_file_list");
1254
1255         flist->count = 0;
1256         flist->malloced = 1000;
1257         flist->files = new_array(struct file_struct *, flist->malloced);
1258         if (!flist->files)
1259                 goto oom;
1260
1261
1262         while ((flags = read_byte(f)) != 0) {
1263                 int i = flist->count;
1264
1265                 flist_expand(flist);
1266
1267                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1268                         flags |= read_byte(f) << 8;
1269                 receive_file_entry(&flist->files[i], flags, flist, f);
1270
1271                 if (S_ISREG(flist->files[i]->mode))
1272                         stats.total_size += flist->files[i]->length;
1273
1274                 flist->count++;
1275
1276                 maybe_emit_filelist_progress(flist);
1277
1278                 if (verbose > 2) {
1279                         rprintf(FINFO, "recv_file_name(%s)\n",
1280                                 f_name(flist->files[i]));
1281                 }
1282         }
1283         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1284
1285         if (verbose > 2)
1286                 rprintf(FINFO, "received %d names\n", flist->count);
1287
1288         if (show_filelist_p())
1289                 finish_filelist_progress(flist);
1290
1291         clean_flist(flist, relative_paths, 1);
1292
1293         if (f != -1) {
1294                 /* Now send the uid/gid list. This was introduced in
1295                  * protocol version 15 */
1296                 recv_uid_list(f, flist);
1297
1298                 if (!read_batch) {
1299                         /* Recv the io_error flag */
1300                         if (lp_ignore_errors(module_id) || ignore_errors)
1301                                 read_int(f);
1302                         else
1303                                 io_error |= read_int(f);
1304                 }
1305         }
1306
1307         if (verbose > 3)
1308                 output_flist(flist);
1309
1310         if (list_only) {
1311                 int i;
1312                 for (i = 0; i < flist->count; i++)
1313                         list_file_entry(flist->files[i]);
1314         }
1315
1316         if (verbose > 2)
1317                 rprintf(FINFO, "recv_file_list done\n");
1318
1319         stats.flist_size = stats.total_read - start_read;
1320         stats.num_files = flist->count;
1321
1322         return flist;
1323
1324 oom:
1325         out_of_memory("recv_file_list");
1326         return NULL;            /* not reached */
1327 }
1328
1329
1330 int file_compare(struct file_struct **file1, struct file_struct **file2)
1331 {
1332         struct file_struct *f1 = *file1;
1333         struct file_struct *f2 = *file2;
1334
1335         if (!f1->basename && !f2->basename)
1336                 return 0;
1337         if (!f1->basename)
1338                 return -1;
1339         if (!f2->basename)
1340                 return 1;
1341         if (f1->dirname == f2->dirname)
1342                 return u_strcmp(f1->basename, f2->basename);
1343         return f_name_cmp(f1, f2);
1344 }
1345
1346
1347 int flist_find(struct file_list *flist, struct file_struct *f)
1348 {
1349         int low = 0, high = flist->count - 1;
1350
1351         while (high >= 0 && !flist->files[high]->basename) high--;
1352
1353         if (high < 0)
1354                 return -1;
1355
1356         while (low != high) {
1357                 int mid = (low + high) / 2;
1358                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1359                 if (ret == 0)
1360                         return flist_up(flist, mid);
1361                 if (ret > 0)
1362                         high = mid;
1363                 else
1364                         low = mid + 1;
1365         }
1366
1367         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1368                 return flist_up(flist, low);
1369         return -1;
1370 }
1371
1372 /*
1373  * Free up any resources a file_struct has allocated
1374  * and clear the file.
1375  */
1376 void clear_file(int i, struct file_list *flist)
1377 {
1378         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1379                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1380         memset(flist->files[i], 0, file_struct_len);
1381 }
1382
1383
1384 /*
1385  * allocate a new file list
1386  */
1387 struct file_list *flist_new(int with_hlink, char *msg)
1388 {
1389         struct file_list *flist;
1390
1391         flist = new(struct file_list);
1392         if (!flist)
1393                 out_of_memory(msg);
1394
1395         memset(flist, 0, sizeof (struct file_list));
1396
1397         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1398             out_of_memory, POOL_INTERN)))
1399                 out_of_memory(msg);
1400
1401 #if SUPPORT_HARD_LINKS
1402         if (with_hlink && preserve_hard_links) {
1403                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1404                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1405                         out_of_memory(msg);
1406         }
1407 #endif
1408
1409         return flist;
1410 }
1411
1412 /*
1413  * free up all elements in a flist
1414  */
1415 void flist_free(struct file_list *flist)
1416 {
1417         pool_destroy(flist->file_pool);
1418         pool_destroy(flist->hlink_pool);
1419         free(flist->files);
1420         free(flist);
1421 }
1422
1423
1424 /*
1425  * This routine ensures we don't have any duplicate names in our file list.
1426  * duplicate names can cause corruption because of the pipelining
1427  */
1428 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1429 {
1430         int i, prev_i = 0;
1431
1432         if (!flist || flist->count == 0)
1433                 return;
1434
1435         qsort(flist->files, flist->count,
1436             sizeof flist->files[0], (int (*)()) file_compare);
1437
1438         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1439                 if (flist->files[i]->basename) {
1440                         prev_i = i;
1441                         break;
1442                 }
1443         }
1444         while (++i < flist->count) {
1445                 if (!flist->files[i]->basename)
1446                         continue;
1447                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1448                         if (verbose > 1 && !am_server) {
1449                                 rprintf(FINFO,
1450                                         "removing duplicate name %s from file list %d\n",
1451                                         f_name(flist->files[i]), i);
1452                         }
1453                         /* Make sure that if we unduplicate '.', that we don't
1454                          * lose track of a user-specified starting point (or
1455                          * else deletions will mysteriously fail with -R). */
1456                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1457                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1458
1459                         clear_file(i, flist);
1460                 } else
1461                         prev_i = i;
1462         }
1463
1464         if (strip_root) {
1465                 /* we need to strip off the root directory in the case
1466                    of relative paths, but this must be done _after_
1467                    the sorting phase */
1468                 for (i = 0; i < flist->count; i++) {
1469                         if (flist->files[i]->dirname &&
1470                             flist->files[i]->dirname[0] == '/') {
1471                                 memmove(&flist->files[i]->dirname[0],
1472                                         &flist->files[i]->dirname[1],
1473                                         strlen(flist->files[i]->dirname));
1474                         }
1475
1476                         if (flist->files[i]->dirname &&
1477                             !flist->files[i]->dirname[0]) {
1478                                 flist->files[i]->dirname = NULL;
1479                         }
1480                 }
1481         }
1482 }
1483
1484 static void output_flist(struct file_list *flist)
1485 {
1486         char uidbuf[16], gidbuf[16];
1487         struct file_struct *file;
1488         int i;
1489
1490         for (i = 0; i < flist->count; i++) {
1491                 file = flist->files[i];
1492                 if (am_root && preserve_uid)
1493                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1494                 else
1495                         *uidbuf = '\0';
1496                 if (preserve_gid && file->gid != GID_NONE)
1497                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1498                 else
1499                         *gidbuf = '\0';
1500                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1501                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1502                         NS(file->basename), (int) file->mode,
1503                         (double) file->length, uidbuf, gidbuf);
1504         }
1505 }
1506
1507
1508 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1509
1510 /* Compare the names of two file_struct entities, just like strcmp()
1511  * would do if it were operating on the joined strings.  We assume
1512  * that there are no 0-length strings.
1513  */
1514 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1515 {
1516         int dif;
1517         const uchar *c1, *c2;
1518         enum fnc_state state1, state2;
1519
1520         if (!f1 || !f1->basename) {
1521                 if (!f2 || !f2->basename)
1522                         return 0;
1523                 return -1;
1524         }
1525         if (!f2 || !f2->basename)
1526                 return 1;
1527
1528         if (!(c1 = (uchar*)f1->dirname)) {
1529                 state1 = fnc_BASE;
1530                 c1 = (uchar*)f1->basename;
1531         } else
1532                 state1 = fnc_DIR;
1533         if (!(c2 = (uchar*)f2->dirname)) {
1534                 state2 = fnc_BASE;
1535                 c2 = (uchar*)f2->basename;
1536         } else
1537                 state2 = fnc_DIR;
1538
1539         while (1) {
1540                 if ((dif = (int)*c1 - (int)*c2) != 0)
1541                         break;
1542                 if (!*++c1) {
1543                         switch (state1) {
1544                         case fnc_DIR:
1545                                 state1 = fnc_SLASH;
1546                                 c1 = (uchar*)"/";
1547                                 break;
1548                         case fnc_SLASH:
1549                                 state1 = fnc_BASE;
1550                                 c1 = (uchar*)f1->basename;
1551                                 break;
1552                         case fnc_BASE:
1553                                 break;
1554                         }
1555                 }
1556                 if (!*++c2) {
1557                         switch (state2) {
1558                         case fnc_DIR:
1559                                 state2 = fnc_SLASH;
1560                                 c2 = (uchar*)"/";
1561                                 break;
1562                         case fnc_SLASH:
1563                                 state2 = fnc_BASE;
1564                                 c2 = (uchar*)f2->basename;
1565                                 break;
1566                         case fnc_BASE:
1567                                 if (!*c1)
1568                                         return 0;
1569                                 break;
1570                         }
1571                 }
1572         }
1573
1574         return dif;
1575 }
1576
1577
1578 /* Return a copy of the full filename of a flist entry, using the indicated
1579  * buffer.  No size-checking is done because we checked the size when creating
1580  * the file_struct entry.
1581  */
1582 char *f_name_to(struct file_struct *f, char *fbuf)
1583 {
1584         if (!f || !f->basename)
1585                 return NULL;
1586
1587         if (f->dirname) {
1588                 int len = strlen(f->dirname);
1589                 memcpy(fbuf, f->dirname, len);
1590                 fbuf[len] = '/';
1591                 strcpy(fbuf + len + 1, f->basename);
1592         } else
1593                 strcpy(fbuf, f->basename);
1594         return fbuf;
1595 }
1596
1597
1598 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1599  */
1600 char *f_name(struct file_struct *f)
1601 {
1602         static char names[5][MAXPATHLEN];
1603         static unsigned int n;
1604
1605         n = (n + 1) % (sizeof names / sizeof names[0]);
1606
1607         return f_name_to(f, names[n]);
1608 }