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