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 relative_paths;
  57 extern int implied_dirs;
  58 extern int copy_links;
  59 extern int copy_unsafe_links;
  60 extern int protocol_version;
  61 extern int sanitize_paths;
  62
  63 extern int read_batch;
  64 extern int write_batch;
  65
  66 extern struct exclude_list_struct exclude_list;
  67 extern struct exclude_list_struct server_exclude_list;
  68 extern struct exclude_list_struct local_exclude_list;
  69
  70 int io_error;
  71
  72 static char empty_sum[MD4_SUM_LENGTH];
  73 static unsigned int file_struct_len;
  74
  75 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  76 static void output_flist(struct file_list *flist);
  77
  78 void init_flist(void)
  79 {
  80         struct file_struct f;
  81
  82         /* Figure out how big the file_struct is without trailing padding */
  83         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
  84 }
  85
  86
  87 static int show_filelist_p(void)
  88 {
  89         return verbose && (recurse || files_from) && !am_server;
  90 }
  91
  92 static void start_filelist_progress(char *kind)
  93 {
  94         rprintf(FINFO, "%s ... ", kind);
  95         if ((verbose > 1) || do_progress)
  96                 rprintf(FINFO, "\n");
  97         rflush(FINFO);
  98 }
  99
 100
 101 static void emit_filelist_progress(const struct file_list *flist)
 102 {
 103         rprintf(FINFO, " %d files...\r", flist->count);
 104 }
 105
 106
 107 static void maybe_emit_filelist_progress(const struct file_list *flist)
 108 {
 109         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 110                 emit_filelist_progress(flist);
 111 }
 112
 113
 114 static void finish_filelist_progress(const struct file_list *flist)
 115 {
 116         if (do_progress) {
 117                 /* This overwrites the progress line */
 118                 rprintf(FINFO, "%d file%sto consider\n",
 119                         flist->count, flist->count == 1 ? " " : "s ");
 120         } else
 121                 rprintf(FINFO, "done\n");
 122 }
 123
 124 void show_flist_stats(void)
 125 {
 126         /* Nothing yet */
 127 }
 128
 129
 130 static void list_file_entry(struct file_struct *f)
 131 {
 132         char perms[11];
 133
 134         if (!f->basename)
 135                 /* this can happen if duplicate names were removed */
 136                 return;
 137
 138         permstring(perms, f->mode);
 139
 140 #if SUPPORT_LINKS
 141         if (preserve_links && S_ISLNK(f->mode)) {
 142                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 143                         perms,
 144                         (double) f->length, timestring(f->modtime),
 145                         f_name(f), f->u.link);
 146         } else
 147 #endif
 148                 rprintf(FINFO, "%s %11.0f %s %s\n",
 149                         perms,
 150                         (double) f->length, timestring(f->modtime),
 151                         f_name(f));
 152 }
 153
 154
 155 /**
 156  * Stat either a symlink or its referent, depending on the settings of
 157  * copy_links, copy_unsafe_links, etc.
 158  *
 159  * @retval -1 on error
 160  *
 161  * @retval 0 for success
 162  *
 163  * @post If @p path is a symlink, then @p linkbuf (of size @c
 164  * MAXPATHLEN) contains the symlink target.
 165  *
 166  * @post @p buffer contains information about the link or the
 167  * referrent as appropriate, if they exist.
 168  **/
 169 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 170 {
 171 #if SUPPORT_LINKS
 172         if (copy_links)
 173                 return do_stat(path, buffer);
 174         if (do_lstat(path, buffer) == -1)
 175                 return -1;
 176         if (S_ISLNK(buffer->st_mode)) {
 177                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 178                 if (l == -1)
 179                         return -1;
 180                 linkbuf[l] = 0;
 181                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 182                         if (verbose > 1) {
 183                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 184                                         path, linkbuf);
 185                         }
 186                         return do_stat(path, buffer);
 187                 }
 188         }
 189         return 0;
 190 #else
 191         return do_stat(path, buffer);
 192 #endif
 193 }
 194
 195 int link_stat(const char *path, STRUCT_STAT * buffer)
 196 {
 197 #if SUPPORT_LINKS
 198         if (copy_links)
 199                 return do_stat(path, buffer);
 200         return do_lstat(path, buffer);
 201 #else
 202         return do_stat(path, buffer);
 203 #endif
 204 }
 205
 206 /*
 207  * This function is used to check if a file should be included/excluded
 208  * from the list of files based on its name and type etc.  The value of
 209  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 210  */
 211 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 212 {
 213         int rc;
 214
 215 #if 0 /* This currently never happens, so avoid a useless compare. */
 216         if (exclude_level == NO_EXCLUDES)
 217                 return 0;
 218 #endif
 219         if (fname) {
 220                 /* never exclude '.', even if somebody does --exclude '*' */
 221                 if (fname[0] == '.' && !fname[1])
 222                         return 0;
 223                 /* Handle the -R version of the '.' dir. */
 224                 if (fname[0] == '/') {
 225                         int len = strlen(fname);
 226                         if (fname[len-1] == '.' && fname[len-2] == '/')
 227                                 return 0;
 228                 }
 229         }
 230         if (server_exclude_list.head
 231             && check_exclude(&server_exclude_list, fname, is_dir) < 0)
 232                 return 1;
 233         if (exclude_level != ALL_EXCLUDES)
 234                 return 0;
 235         if (exclude_list.head
 236             && (rc = check_exclude(&exclude_list, fname, is_dir)) != 0)
 237                 return rc < 0;
 238         if (local_exclude_list.head
 239             && check_exclude(&local_exclude_list, fname, is_dir) < 0)
 240                 return 1;
 241         return 0;
 242 }
 243
 244 /* used by the one_file_system code */
 245 static dev_t filesystem_dev;
 246
 247 static void set_filesystem(char *fname)
 248 {
 249         STRUCT_STAT st;
 250         if (link_stat(fname, &st) != 0)
 251                 return;
 252         filesystem_dev = st.st_dev;
 253 }
 254
 255
 256 static int to_wire_mode(mode_t mode)
 257 {
 258 #if SUPPORT_LINKS
 259         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 260                 return (mode & ~(_S_IFMT)) | 0120000;
 261 #endif
 262         return (int) mode;
 263 }
 264
 265 static mode_t from_wire_mode(int mode)
 266 {
 267         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 268                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 269         return (mode_t) mode;
 270 }
 271
 272
 273 static void send_directory(int f, struct file_list *flist, char *dir);
 274
 275 static char *flist_dir;
 276 static int flist_dir_len;
 277
 278
 279 /**
 280  * Make sure @p flist is big enough to hold at least @p flist->count
 281  * entries.
 282  **/
 283 void flist_expand(struct file_list *flist)
 284 {
 285         struct file_struct **new_ptr;
 286
 287         if (flist->count < flist->malloced)
 288                 return;
 289
 290         if (flist->malloced < FLIST_START)
 291                 flist->malloced = FLIST_START;
 292         else if (flist->malloced >= FLIST_LINEAR)
 293                 flist->malloced += FLIST_LINEAR;
 294         else
 295                 flist->malloced *= 2;
 296
 297         /*
 298          * In case count jumped or we are starting the list
 299          * with a known size just set it.
 300          */
 301         if (flist->malloced < flist->count)
 302                 flist->malloced = flist->count;
 303
 304         new_ptr = realloc_array(flist->files, struct file_struct *,
 305                                 flist->malloced);
 306
 307         if (verbose >= 2) {
 308                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 309                     who_am_i(),
 310                     (double) sizeof flist->files[0] * flist->malloced,
 311                     (new_ptr == flist->files) ? " not" : "");
 312         }
 313
 314         flist->files = new_ptr;
 315
 316         if (!flist->files)
 317                 out_of_memory("flist_expand");
 318 }
 319
 320 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 321 {
 322         unsigned short flags;
 323         static time_t modtime;
 324         static mode_t mode;
 325         static uint64 dev;
 326         static dev_t rdev;
 327         static uint32 rdev_major;
 328         static uid_t uid;
 329         static gid_t gid;
 330         static char lastname[MAXPATHLEN];
 331         char *fname, fbuf[MAXPATHLEN];
 332         int l1, l2;
 333
 334         if (f == -1)
 335                 return;
 336
 337         if (!file) {
 338                 write_byte(f, 0);
 339                 modtime = 0, mode = 0;
 340                 dev = 0, rdev = makedev(0, 0);
 341                 rdev_major = 0;
 342                 uid = 0, gid = 0;
 343                 *lastname = '\0';
 344                 return;
 345         }
 346
 347         io_write_phase = "send_file_entry";
 348
 349         fname = f_name_to(file, fbuf);
 350
 351         flags = base_flags;
 352
 353         if (file->mode == mode)
 354                 flags |= XMIT_SAME_MODE;
 355         else
 356                 mode = file->mode;
 357         if (preserve_devices) {
 358                 if (protocol_version < 28) {
 359                         if (IS_DEVICE(mode)) {
 360                                 if (file->u.rdev == rdev)
 361                                         flags |= XMIT_SAME_RDEV_pre28;
 362                                 else
 363                                         rdev = file->u.rdev;
 364                         } else
 365                                 rdev = makedev(0, 0);
 366                 } else if (IS_DEVICE(mode)) {
 367                         rdev = file->u.rdev;
 368                         if ((uint32)major(rdev) == rdev_major)
 369                                 flags |= XMIT_SAME_RDEV_MAJOR;
 370                         else
 371                                 rdev_major = major(rdev);
 372                         if ((uint32)minor(rdev) <= 0xFFu)
 373                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 374                 }
 375         }
 376         if (file->uid == uid)
 377                 flags |= XMIT_SAME_UID;
 378         else
 379                 uid = file->uid;
 380         if (file->gid == gid)
 381                 flags |= XMIT_SAME_GID;
 382         else
 383                 gid = file->gid;
 384         if (file->modtime == modtime)
 385                 flags |= XMIT_SAME_TIME;
 386         else
 387                 modtime = file->modtime;
 388
 389 #if SUPPORT_HARD_LINKS
 390         if (file->link_u.idev) {
 391                 if (file->F_DEV == dev) {
 392                         if (protocol_version >= 28)
 393                                 flags |= XMIT_SAME_DEV;
 394                 } else
 395                         dev = file->F_DEV;
 396                 flags |= XMIT_HAS_IDEV_DATA;
 397         }
 398 #endif
 399
 400         for (l1 = 0;
 401             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 402             l1++) {}
 403         l2 = strlen(fname+l1);
 404
 405         if (l1 > 0)
 406                 flags |= XMIT_SAME_NAME;
 407         if (l2 > 255)
 408                 flags |= XMIT_LONG_NAME;
 409
 410         /* We must make sure we don't send a zero flag byte or the
 411          * other end will terminate the flist transfer.  Note that
 412          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 413          * it's harmless way to add a bit to the first flag byte. */
 414         if (protocol_version >= 28) {
 415                 if (!flags && !S_ISDIR(mode))
 416                         flags |= XMIT_TOP_DIR;
 417                 if ((flags & 0xFF00) || !flags) {
 418                         flags |= XMIT_EXTENDED_FLAGS;
 419                         write_byte(f, flags);
 420                         write_byte(f, flags >> 8);
 421                 } else
 422                         write_byte(f, flags);
 423         } else {
 424                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 425                         flags |= XMIT_TOP_DIR;
 426                 if (!(flags & 0xFF))
 427                         flags |= XMIT_LONG_NAME;
 428                 write_byte(f, flags);
 429         }
 430         if (flags & XMIT_SAME_NAME)
 431                 write_byte(f, l1);
 432         if (flags & XMIT_LONG_NAME)
 433                 write_int(f, l2);
 434         else
 435                 write_byte(f, l2);
 436         write_buf(f, fname + l1, l2);
 437
 438         write_longint(f, file->length);
 439         if (!(flags & XMIT_SAME_TIME))
 440                 write_int(f, modtime);
 441         if (!(flags & XMIT_SAME_MODE))
 442                 write_int(f, to_wire_mode(mode));
 443         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 444                 if (!numeric_ids)
 445                         add_uid(uid);
 446                 write_int(f, uid);
 447         }
 448         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 449                 if (!numeric_ids)
 450                         add_gid(gid);
 451                 write_int(f, gid);
 452         }
 453         if (preserve_devices && IS_DEVICE(mode)) {
 454                 if (protocol_version < 28) {
 455                         if (!(flags & XMIT_SAME_RDEV_pre28))
 456                                 write_int(f, (int)rdev);
 457                 } else {
 458                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 459                                 write_int(f, major(rdev));
 460                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 461                                 write_byte(f, minor(rdev));
 462                         else
 463                                 write_int(f, minor(rdev));
 464                 }
 465         }
 466
 467 #if SUPPORT_LINKS
 468         if (preserve_links && S_ISLNK(mode)) {
 469                 int len = strlen(file->u.link);
 470                 write_int(f, len);
 471                 write_buf(f, file->u.link, len);
 472         }
 473 #endif
 474
 475 #if SUPPORT_HARD_LINKS
 476         if (flags & XMIT_HAS_IDEV_DATA) {
 477                 if (protocol_version < 26) {
 478                         /* 32-bit dev_t and ino_t */
 479                         write_int(f, dev);
 480                         write_int(f, file->F_INODE);
 481                 } else {
 482                         /* 64-bit dev_t and ino_t */
 483                         if (!(flags & XMIT_SAME_DEV))
 484                                 write_longint(f, dev);
 485                         write_longint(f, file->F_INODE);
 486                 }
 487         }
 488 #endif
 489
 490         if (always_checksum) {
 491                 char *sum;
 492                 if (S_ISREG(mode))
 493                         sum = file->u.sum;
 494                 else if (protocol_version < 28) {
 495                         /* Prior to 28, we sent a useless set of nulls. */
 496                         sum = empty_sum;
 497                 } else
 498                         sum = NULL;
 499                 if (sum) {
 500                         write_buf(f, sum,
 501                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 502                 }
 503         }
 504
 505         strlcpy(lastname, fname, MAXPATHLEN);
 506
 507         io_write_phase = "unknown";
 508 }
 509
 510
 511
 512 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 513     struct file_list *flist, int f)
 514 {
 515         static time_t modtime;
 516         static mode_t mode;
 517         static uint64 dev;
 518         static dev_t rdev;
 519         static uint32 rdev_major;
 520         static uid_t uid;
 521         static gid_t gid;
 522         static char lastname[MAXPATHLEN], *lastdir;
 523         static int lastdir_len = -1;
 524         char thisname[MAXPATHLEN];
 525         unsigned int l1 = 0, l2 = 0;
 526         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 527         OFF_T file_length;
 528         char *basename, *dirname, *bp;
 529         struct file_struct *file;
 530
 531         if (!fptr) {
 532                 modtime = 0, mode = 0;
 533                 dev = 0, rdev = makedev(0, 0);
 534                 rdev_major = 0;
 535                 uid = 0, gid = 0;
 536                 *lastname = '\0';
 537                 lastdir_len = -1;
 538                 return;
 539         }
 540
 541         if (flags & XMIT_SAME_NAME)
 542                 l1 = read_byte(f);
 543
 544         if (flags & XMIT_LONG_NAME)
 545                 l2 = read_int(f);
 546         else
 547                 l2 = read_byte(f);
 548
 549         if (l2 >= MAXPATHLEN - l1) {
 550                 rprintf(FERROR,
 551                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 552                         flags, l1, l2, lastname);
 553                 overflow("receive_file_entry");
 554         }
 555
 556         strlcpy(thisname, lastname, l1 + 1);
 557         read_sbuf(f, &thisname[l1], l2);
 558         thisname[l1 + l2] = 0;
 559
 560         strlcpy(lastname, thisname, MAXPATHLEN);
 561
 562         clean_fname(thisname);
 563
 564         if (sanitize_paths)
 565                 sanitize_path(thisname, NULL);
 566
 567         if ((basename = strrchr(thisname, '/')) != NULL) {
 568                 dirname_len = ++basename - thisname; /* counts future '\0' */
 569                 if (lastdir_len == dirname_len - 1
 570                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 571                         dirname = lastdir;
 572                         dirname_len = 0; /* indicates no copy is needed */
 573                 } else
 574                         dirname = thisname;
 575         } else {
 576                 basename = thisname;
 577                 dirname = NULL;
 578                 dirname_len = 0;
 579         }
 580         basename_len = strlen(basename) + 1; /* count the '\0' */
 581
 582         file_length = read_longint(f);
 583         if (!(flags & XMIT_SAME_TIME))
 584                 modtime = (time_t)read_int(f);
 585         if (!(flags & XMIT_SAME_MODE))
 586                 mode = from_wire_mode(read_int(f));
 587
 588         if (preserve_uid && !(flags & XMIT_SAME_UID))
 589                 uid = (uid_t)read_int(f);
 590         if (preserve_gid && !(flags & XMIT_SAME_GID))
 591                 gid = (gid_t)read_int(f);
 592
 593         if (preserve_devices) {
 594                 if (protocol_version < 28) {
 595                         if (IS_DEVICE(mode)) {
 596                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 597                                         rdev = (dev_t)read_int(f);
 598                         } else
 599                                 rdev = makedev(0, 0);
 600                 } else if (IS_DEVICE(mode)) {
 601                         uint32 rdev_minor;
 602                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 603                                 rdev_major = read_int(f);
 604                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 605                                 rdev_minor = read_byte(f);
 606                         else
 607                                 rdev_minor = read_int(f);
 608                         rdev = makedev(rdev_major, rdev_minor);
 609                 }
 610         }
 611
 612 #if SUPPORT_LINKS
 613         if (preserve_links && S_ISLNK(mode)) {
 614                 linkname_len = read_int(f) + 1; /* count the '\0' */
 615                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 616                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 617                                 linkname_len - 1);
 618                         overflow("receive_file_entry");
 619                 }
 620         }
 621         else
 622 #endif
 623                 linkname_len = 0;
 624
 625         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 626
 627         alloc_len = file_struct_len + dirname_len + basename_len
 628                   + linkname_len + sum_len;
 629         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 630
 631         file = *fptr = (struct file_struct *)bp;
 632         memset(bp, 0, file_struct_len);
 633         bp += file_struct_len;
 634
 635         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 636         file->modtime = modtime;
 637         file->length = file_length;
 638         file->mode = mode;
 639         file->uid = uid;
 640         file->gid = gid;
 641
 642         if (dirname_len) {
 643                 file->dirname = lastdir = bp;
 644                 lastdir_len = dirname_len - 1;
 645                 memcpy(bp, dirname, dirname_len - 1);
 646                 bp += dirname_len;
 647                 bp[-1] = '\0';
 648         } else if (dirname)
 649                 file->dirname = dirname;
 650
 651         file->basename = bp;
 652         memcpy(bp, basename, basename_len);
 653         bp += basename_len;
 654
 655         if (preserve_devices && IS_DEVICE(mode))
 656                 file->u.rdev = rdev;
 657
 658 #if SUPPORT_LINKS
 659         if (linkname_len) {
 660                 file->u.link = bp;
 661                 read_sbuf(f, bp, linkname_len - 1);
 662                 if (sanitize_paths)
 663                         sanitize_path(bp, lastdir);
 664                 bp += linkname_len;
 665         }
 666 #endif
 667
 668 #if SUPPORT_HARD_LINKS
 669         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 670                 flags |= XMIT_HAS_IDEV_DATA;
 671         if (flags & XMIT_HAS_IDEV_DATA) {
 672                 uint64 inode;
 673                 if (protocol_version < 26) {
 674                         dev = read_int(f);
 675                         inode = read_int(f);
 676                 } else {
 677                         if (!(flags & XMIT_SAME_DEV))
 678                                 dev = read_longint(f);
 679                         inode = read_longint(f);
 680                 }
 681                 if (flist->hlink_pool) {
 682                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 683                             struct idev, 1, "inode_table");
 684                         file->F_INODE = inode;
 685                         file->F_DEV = dev;
 686                 }
 687         }
 688 #endif
 689
 690         if (always_checksum) {
 691                 char *sum;
 692                 if (sum_len) {
 693                         file->u.sum = sum = bp;
 694                         /*bp += sum_len;*/
 695                 } else if (protocol_version < 28) {
 696                         /* Prior to 28, we get a useless set of nulls. */
 697                         sum = empty_sum;
 698                 } else
 699                         sum = NULL;
 700                 if (sum) {
 701                         read_buf(f, sum,
 702                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 703                 }
 704         }
 705
 706         if (!preserve_perms) {
 707                 extern int orig_umask;
 708                 /* set an appropriate set of permissions based on original
 709                  * permissions and umask. This emulates what GNU cp does */
 710                 file->mode &= ~orig_umask;
 711         }
 712 }
 713
 714
 715 /**
 716  * Create a file_struct for a named file by reading its stat()
 717  * information and performing extensive checks against global
 718  * options.
 719  *
 720  * @return the new file, or NULL if there was an error or this file
 721  * should be excluded.
 722  *
 723  * @todo There is a small optimization opportunity here to avoid
 724  * stat()ing the file in some circumstances, which has a certain cost.
 725  * We are called immediately after doing readdir(), and so we may
 726  * already know the d_type of the file.  We could for example avoid
 727  * statting directories if we're not recursing, but this is not a very
 728  * important case.  Some systems may not have d_type.
 729  **/
 730 struct file_struct *make_file(char *fname,
 731     struct file_list *flist, int exclude_level)
 732 {
 733         static char *lastdir;
 734         static int lastdir_len = -1;
 735         struct file_struct *file;
 736         STRUCT_STAT st;
 737         char sum[SUM_LENGTH];
 738         char thisname[MAXPATHLEN];
 739         char linkname[MAXPATHLEN];
 740         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 741         char *basename, *dirname, *bp;
 742         unsigned short flags = 0;
 743
 744         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 745                 lastdir_len = -1;
 746
 747         if (strlcpy(thisname, fname, sizeof thisname)
 748             >= sizeof thisname - flist_dir_len) {
 749                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 750                 return NULL;
 751         }
 752         clean_fname(thisname);
 753         if (sanitize_paths)
 754                 sanitize_path(thisname, NULL);
 755
 756         memset(sum, 0, SUM_LENGTH);
 757
 758         if (readlink_stat(thisname, &st, linkname) != 0) {
 759                 int save_errno = errno;
 760                 if (errno == ENOENT) {
 761                         enum logcode c = am_daemon && protocol_version < 28
 762                             ? FERROR : FINFO;
 763                         /* either symlink pointing nowhere or file that
 764                          * was removed during rsync run; see if excluded
 765                          * before reporting an error */
 766                         if (exclude_level != NO_EXCLUDES
 767                             && check_exclude_file(thisname, 0, exclude_level)) {
 768                                 /* file is excluded anyway, ignore silently */
 769                                 return NULL;
 770                         }
 771                         io_error |= IOERR_VANISHED;
 772                         rprintf(c, "file has vanished: %s\n",
 773                             full_fname(thisname));
 774                 }
 775                 else {
 776                         io_error |= IOERR_GENERAL;
 777                         rsyserr(FERROR, save_errno, "readlink %s failed",
 778                                 full_fname(thisname));
 779                 }
 780                 return NULL;
 781         }
 782
 783         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 784         if (exclude_level == NO_EXCLUDES)
 785                 goto skip_excludes;
 786
 787         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 788                 rprintf(FINFO, "skipping directory %s\n", thisname);
 789                 return NULL;
 790         }
 791
 792         /* We only care about directories because we need to avoid recursing
 793          * into a mount-point directory, not to avoid copying a symlinked
 794          * file if -L (or similar) was specified. */
 795         if (one_file_system && st.st_dev != filesystem_dev
 796             && S_ISDIR(st.st_mode))
 797                 flags |= FLAG_MOUNT_POINT;
 798
 799         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 800                 return NULL;
 801
 802         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 803                 return NULL;
 804
 805 skip_excludes:
 806
 807         if (verbose > 2) {
 808                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 809                         who_am_i(), thisname, exclude_level);
 810         }
 811
 812         if ((basename = strrchr(thisname, '/')) != NULL) {
 813                 dirname_len = ++basename - thisname; /* counts future '\0' */
 814                 if (lastdir_len == dirname_len - 1
 815                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 816                         dirname = lastdir;
 817                         dirname_len = 0; /* indicates no copy is needed */
 818                 } else
 819                         dirname = thisname;
 820         } else {
 821                 basename = thisname;
 822                 dirname = NULL;
 823                 dirname_len = 0;
 824         }
 825         basename_len = strlen(basename) + 1; /* count the '\0' */
 826
 827 #if SUPPORT_LINKS
 828         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 829 #else
 830         linkname_len = 0;
 831 #endif
 832
 833         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 834
 835         alloc_len = file_struct_len + dirname_len + basename_len
 836             + linkname_len + sum_len;
 837         if (flist) {
 838                 bp = pool_alloc(flist->file_pool, alloc_len,
 839                     "receive_file_entry");
 840         } else {
 841                 if (!(bp = new_array(char, alloc_len)))
 842                         out_of_memory("receive_file_entry");
 843         }
 844
 845         file = (struct file_struct *)bp;
 846         memset(bp, 0, file_struct_len);
 847         bp += file_struct_len;
 848
 849         file->flags = flags;
 850         file->modtime = st.st_mtime;
 851         file->length = st.st_size;
 852         file->mode = st.st_mode;
 853         file->uid = st.st_uid;
 854         file->gid = st.st_gid;
 855
 856 #if SUPPORT_HARD_LINKS
 857         if (flist && flist->hlink_pool) {
 858                 if (protocol_version < 28) {
 859                         if (S_ISREG(st.st_mode))
 860                                 file->link_u.idev = pool_talloc(
 861                                     flist->hlink_pool, struct idev, 1,
 862                                     "inode_table");
 863                 } else {
 864                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 865                                 file->link_u.idev = pool_talloc(
 866                                     flist->hlink_pool, struct idev, 1,
 867                                     "inode_table");
 868                 }
 869         }
 870         if (file->link_u.idev) {
 871                 file->F_DEV = st.st_dev;
 872                 file->F_INODE = st.st_ino;
 873         }
 874 #endif
 875
 876         if (dirname_len) {
 877                 file->dirname = lastdir = bp;
 878                 lastdir_len = dirname_len - 1;
 879                 memcpy(bp, dirname, dirname_len - 1);
 880                 bp += dirname_len;
 881                 bp[-1] = '\0';
 882         } else if (dirname)
 883                 file->dirname = dirname;
 884
 885         file->basename = bp;
 886         memcpy(bp, basename, basename_len);
 887         bp += basename_len;
 888
 889 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 890         if (preserve_devices && IS_DEVICE(st.st_mode))
 891                 file->u.rdev = st.st_rdev;
 892 #endif
 893
 894 #if SUPPORT_LINKS
 895         if (linkname_len) {
 896                 file->u.link = bp;
 897                 memcpy(bp, linkname, linkname_len);
 898                 bp += linkname_len;
 899         }
 900 #endif
 901
 902         if (sum_len) {
 903                 file->u.sum = bp;
 904                 file_checksum(thisname, bp, st.st_size);
 905                 /*bp += sum_len;*/
 906         }
 907
 908         file->basedir = flist_dir;
 909
 910         if (!S_ISDIR(st.st_mode))
 911                 stats.total_size += st.st_size;
 912
 913         return file;
 914 }
 915
 916
 917 void send_file_name(int f, struct file_list *flist, char *fname,
 918                     int recursive, unsigned short base_flags)
 919 {
 920         struct file_struct *file;
 921         char fbuf[MAXPATHLEN];
 922         extern int delete_excluded;
 923
 924         /* f is set to -1 when calculating deletion file list */
 925         file = make_file(fname, flist,
 926             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 927
 928         if (!file)
 929                 return;
 930
 931         maybe_emit_filelist_progress(flist);
 932
 933         flist_expand(flist);
 934
 935         if (write_batch)
 936                 file->flags |= FLAG_TOP_DIR;
 937
 938         if (file->basename[0]) {
 939                 flist->files[flist->count++] = file;
 940                 send_file_entry(file, f, base_flags);
 941         }
 942
 943         if (recursive && S_ISDIR(file->mode)
 944             && !(file->flags & FLAG_MOUNT_POINT)) {
 945                 struct exclude_list_struct last_list = local_exclude_list;
 946                 local_exclude_list.head = local_exclude_list.tail = NULL;
 947                 send_directory(f, flist, f_name_to(file, fbuf));
 948                 if (verbose > 2) {
 949                         rprintf(FINFO, "[%s] popping %sexclude list\n",
 950                                 who_am_i(), local_exclude_list.debug_type);
 951                 }
 952                 clear_exclude_list(&local_exclude_list);
 953                 local_exclude_list = last_list;
 954         }
 955 }
 956
 957
 958 static void send_directory(int f, struct file_list *flist, char *dir)
 959 {
 960         DIR *d;
 961         struct dirent *di;
 962         char fname[MAXPATHLEN];
 963         unsigned int offset;
 964         char *p;
 965
 966         d = opendir(dir);
 967         if (!d) {
 968                 io_error |= IOERR_GENERAL;
 969                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(dir));
 970                 return;
 971         }
 972
 973         offset = strlcpy(fname, dir, MAXPATHLEN);
 974         p = fname + offset;
 975         if (offset >= MAXPATHLEN || p[-1] != '/') {
 976                 if (offset >= MAXPATHLEN - 1) {
 977                         io_error |= IOERR_GENERAL;
 978                         rprintf(FERROR, "skipping long-named directory: %s\n",
 979                                 full_fname(fname));
 980                         closedir(d);
 981                         return;
 982                 }
 983                 *p++ = '/';
 984                 offset++;
 985         }
 986
 987         if (cvs_exclude) {
 988                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 989                     < MAXPATHLEN - offset) {
 990                         add_exclude_file(&local_exclude_list, fname,
 991                                          XFLG_WORD_SPLIT | XFLG_WORDS_ONLY);
 992                 } else {
 993                         io_error |= IOERR_GENERAL;
 994                         rprintf(FINFO,
 995                                 "cannot cvs-exclude in long-named directory %s\n",
 996                                 full_fname(fname));
 997                 }
 998         }
 999
1000         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1001                 char *dname = d_name(di);
1002                 if (dname[0] == '.' && (dname[1] == '\0'
1003                     || (dname[1] == '.' && dname[2] == '\0')))
1004                         continue;
1005                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1006                         send_file_name(f, flist, fname, recurse, 0);
1007                 else {
1008                         io_error |= IOERR_GENERAL;
1009                         rprintf(FINFO,
1010                                 "cannot send long-named file %s\n",
1011                                 full_fname(fname));
1012                 }
1013         }
1014         if (errno) {
1015                 io_error |= IOERR_GENERAL;
1016                 rsyserr(FERROR, errno, "readdir(%s)", dir);
1017         }
1018
1019         closedir(d);
1020 }
1021
1022
1023 /**
1024  * The delete_files() function in receiver.c sets f to -1 so that we just
1025  * construct the file list in memory without sending it over the wire.  It
1026  * also has the side-effect of ignoring user-excludes if delete_excluded
1027  * is set (so that the delete list includes user-excluded files).
1028  **/
1029 struct file_list *send_file_list(int f, int argc, char *argv[])
1030 {
1031         int l;
1032         STRUCT_STAT st;
1033         char *p, *dir, olddir[sizeof curr_dir];
1034         char lastpath[MAXPATHLEN] = "";
1035         struct file_list *flist;
1036         int64 start_write;
1037         int use_ff_fd = 0;
1038
1039         if (show_filelist_p() && f != -1)
1040                 start_filelist_progress("building file list");
1041
1042         start_write = stats.total_written;
1043
1044         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1045             "send_file_list");
1046
1047         if (f != -1) {
1048                 io_start_buffering_out(f);
1049                 if (filesfrom_fd >= 0) {
1050                         if (argv[0] && !push_dir(argv[0])) {
1051                                 rsyserr(FERROR, errno, "push_dir %s failed",
1052                                         full_fname(argv[0]));
1053                                 exit_cleanup(RERR_FILESELECT);
1054                         }
1055                         use_ff_fd = 1;
1056                 }
1057         }
1058
1059         while (1) {
1060                 char fname2[MAXPATHLEN];
1061                 char *fname = fname2;
1062
1063                 if (use_ff_fd) {
1064                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1065                                 break;
1066                         sanitize_path(fname, NULL);
1067                 } else {
1068                         if (argc-- == 0)
1069                                 break;
1070                         strlcpy(fname, *argv++, MAXPATHLEN);
1071                         if (sanitize_paths)
1072                                 sanitize_path(fname, NULL);
1073                 }
1074
1075                 l = strlen(fname);
1076                 if (fname[l - 1] == '/') {
1077                         if (l == 2 && fname[0] == '.') {
1078                                 /* Turn "./" into just "." rather than "./." */
1079                                 fname[1] = '\0';
1080                         } else if (l < MAXPATHLEN) {
1081                                 fname[l++] = '.';
1082                                 fname[l] = '\0';
1083                         }
1084                 }
1085
1086                 if (link_stat(fname, &st) != 0) {
1087                         if (f != -1) {
1088                                 io_error |= IOERR_GENERAL;
1089                                 rsyserr(FERROR, errno, "link_stat %s failed",
1090                                         full_fname(fname));
1091                         }
1092                         continue;
1093                 }
1094
1095                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1096                         rprintf(FINFO, "skipping directory %s\n", fname);
1097                         continue;
1098                 }
1099
1100                 dir = NULL;
1101                 olddir[0] = '\0';
1102
1103                 if (!relative_paths) {
1104                         p = strrchr(fname, '/');
1105                         if (p) {
1106                                 *p = 0;
1107                                 if (p == fname)
1108                                         dir = "/";
1109                                 else
1110                                         dir = fname;
1111                                 fname = p + 1;
1112                         }
1113                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1114                         /* this ensures we send the intermediate directories,
1115                            thus getting their permissions right */
1116                         char *lp = lastpath, *fn = fname, *slash = fname;
1117                         *p = 0;
1118                         /* Skip any initial directories in our path that we
1119                          * have in common with lastpath. */
1120                         while (*fn && *lp == *fn) {
1121                                 if (*fn == '/')
1122                                         slash = fn;
1123                                 lp++, fn++;
1124                         }
1125                         *p = '/';
1126                         if (fn != p || (*lp && *lp != '/')) {
1127                                 int copy_links_saved = copy_links;
1128                                 int recurse_saved = recurse;
1129                                 copy_links = copy_unsafe_links;
1130                                 /* set recurse to 1 to prevent make_file
1131                                  * from ignoring directory, but still
1132                                  * turn off the recursive parameter to
1133                                  * send_file_name */
1134                                 recurse = 1;
1135                                 while ((slash = strchr(slash+1, '/')) != 0) {
1136                                         *slash = 0;
1137                                         send_file_name(f, flist, fname, 0, 0);
1138                                         *slash = '/';
1139                                 }
1140                                 copy_links = copy_links_saved;
1141                                 recurse = recurse_saved;
1142                                 *p = 0;
1143                                 strlcpy(lastpath, fname, sizeof lastpath);
1144                                 *p = '/';
1145                         }
1146                 }
1147
1148                 if (!*fname)
1149                         fname = ".";
1150
1151                 if (dir && *dir) {
1152                         static char *lastdir;
1153                         static int lastdir_len;
1154
1155                         strcpy(olddir, curr_dir); /* can't overflow */
1156
1157                         if (!push_dir(dir)) {
1158                                 io_error |= IOERR_GENERAL;
1159                                 rsyserr(FERROR, errno, "push_dir %s failed",
1160                                         full_fname(dir));
1161                                 continue;
1162                         }
1163
1164                         if (lastdir && strcmp(lastdir, dir) == 0) {
1165                                 flist_dir = lastdir;
1166                                 flist_dir_len = lastdir_len;
1167                         } else {
1168                                 flist_dir = lastdir = strdup(dir);
1169                                 flist_dir_len = lastdir_len = strlen(dir);
1170                         }
1171                 }
1172
1173                 if (one_file_system)
1174                         set_filesystem(fname);
1175
1176                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1177
1178                 if (olddir[0]) {
1179                         flist_dir = NULL;
1180                         flist_dir_len = 0;
1181                         if (!pop_dir(olddir)) {
1182                                 rsyserr(FERROR, errno, "pop_dir %s failed",
1183                                         full_fname(dir));
1184                                 exit_cleanup(RERR_FILESELECT);
1185                         }
1186                 }
1187         }
1188
1189         if (f != -1) {
1190                 send_file_entry(NULL, f, 0);
1191
1192                 if (show_filelist_p())
1193                         finish_filelist_progress(flist);
1194         }
1195
1196         if (flist->hlink_pool) {
1197                 pool_destroy(flist->hlink_pool);
1198                 flist->hlink_pool = NULL;
1199         }
1200
1201         clean_flist(flist, 0, 0);
1202
1203         if (f != -1) {
1204                 /* Now send the uid/gid list. This was introduced in
1205                  * protocol version 15 */
1206                 send_uid_list(f);
1207
1208                 /* send the io_error flag */
1209                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1210
1211                 io_end_buffering();
1212                 stats.flist_size = stats.total_written - start_write;
1213                 stats.num_files = flist->count;
1214                 if (write_batch)
1215                         write_batch_flist_info(flist->count, flist->files);
1216         }
1217
1218         if (verbose > 3)
1219                 output_flist(flist);
1220
1221         if (verbose > 2)
1222                 rprintf(FINFO, "send_file_list done\n");
1223
1224         return flist;
1225 }
1226
1227
1228 struct file_list *recv_file_list(int f)
1229 {
1230         struct file_list *flist;
1231         unsigned short flags;
1232         int64 start_read;
1233         extern int list_only;
1234
1235         if (show_filelist_p())
1236                 start_filelist_progress("receiving file list");
1237
1238         start_read = stats.total_read;
1239
1240         flist = flist_new(WITH_HLINK, "recv_file_list");
1241
1242         flist->count = 0;
1243         flist->malloced = 1000;
1244         flist->files = new_array(struct file_struct *, flist->malloced);
1245         if (!flist->files)
1246                 goto oom;
1247
1248
1249         while ((flags = read_byte(f)) != 0) {
1250                 int i = flist->count;
1251
1252                 flist_expand(flist);
1253
1254                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1255                         flags |= read_byte(f) << 8;
1256                 receive_file_entry(&flist->files[i], flags, flist, f);
1257
1258                 if (S_ISREG(flist->files[i]->mode))
1259                         stats.total_size += flist->files[i]->length;
1260
1261                 flist->count++;
1262
1263                 maybe_emit_filelist_progress(flist);
1264
1265                 if (verbose > 2) {
1266                         rprintf(FINFO, "recv_file_name(%s)\n",
1267                                 f_name(flist->files[i]));
1268                 }
1269         }
1270         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1271
1272         if (verbose > 2)
1273                 rprintf(FINFO, "received %d names\n", flist->count);
1274
1275         if (show_filelist_p())
1276                 finish_filelist_progress(flist);
1277
1278         clean_flist(flist, relative_paths, 1);
1279
1280         if (f != -1) {
1281                 /* Now send the uid/gid list. This was introduced in
1282                  * protocol version 15 */
1283                 recv_uid_list(f, flist);
1284
1285                 if (!read_batch) {
1286                         /* Recv the io_error flag */
1287                         if (lp_ignore_errors(module_id) || ignore_errors)
1288                                 read_int(f);
1289                         else
1290                                 io_error |= read_int(f);
1291                 }
1292         }
1293
1294         if (verbose > 3)
1295                 output_flist(flist);
1296
1297         if (list_only) {
1298                 int i;
1299                 for (i = 0; i < flist->count; i++)
1300                         list_file_entry(flist->files[i]);
1301         }
1302
1303         if (verbose > 2)
1304                 rprintf(FINFO, "recv_file_list done\n");
1305
1306         stats.flist_size = stats.total_read - start_read;
1307         stats.num_files = flist->count;
1308
1309         return flist;
1310
1311 oom:
1312         out_of_memory("recv_file_list");
1313         return NULL;            /* not reached */
1314 }
1315
1316
1317 int file_compare(struct file_struct **file1, struct file_struct **file2)
1318 {
1319         struct file_struct *f1 = *file1;
1320         struct file_struct *f2 = *file2;
1321
1322         if (!f1->basename && !f2->basename)
1323                 return 0;
1324         if (!f1->basename)
1325                 return -1;
1326         if (!f2->basename)
1327                 return 1;
1328         if (f1->dirname == f2->dirname)
1329                 return u_strcmp(f1->basename, f2->basename);
1330         return f_name_cmp(f1, f2);
1331 }
1332
1333
1334 int flist_find(struct file_list *flist, struct file_struct *f)
1335 {
1336         int low = 0, high = flist->count - 1;
1337
1338         while (high >= 0 && !flist->files[high]->basename) high--;
1339
1340         if (high < 0)
1341                 return -1;
1342
1343         while (low != high) {
1344                 int mid = (low + high) / 2;
1345                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1346                 if (ret == 0)
1347                         return flist_up(flist, mid);
1348                 if (ret > 0)
1349                         high = mid;
1350                 else
1351                         low = mid + 1;
1352         }
1353
1354         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1355                 return flist_up(flist, low);
1356         return -1;
1357 }
1358
1359 /*
1360  * Free up any resources a file_struct has allocated
1361  * and clear the file.
1362  */
1363 void clear_file(int i, struct file_list *flist)
1364 {
1365         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1366                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1367         memset(flist->files[i], 0, file_struct_len);
1368 }
1369
1370
1371 /*
1372  * allocate a new file list
1373  */
1374 struct file_list *flist_new(int with_hlink, char *msg)
1375 {
1376         struct file_list *flist;
1377
1378         flist = new(struct file_list);
1379         if (!flist)
1380                 out_of_memory(msg);
1381
1382         memset(flist, 0, sizeof (struct file_list));
1383
1384         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1385             out_of_memory, POOL_INTERN)))
1386                 out_of_memory(msg);
1387
1388 #if SUPPORT_HARD_LINKS
1389         if (with_hlink && preserve_hard_links) {
1390                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1391                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1392                         out_of_memory(msg);
1393         }
1394 #endif
1395
1396         return flist;
1397 }
1398
1399 /*
1400  * free up all elements in a flist
1401  */
1402 void flist_free(struct file_list *flist)
1403 {
1404         pool_destroy(flist->file_pool);
1405         pool_destroy(flist->hlink_pool);
1406         free(flist->files);
1407         free(flist);
1408 }
1409
1410
1411 /*
1412  * This routine ensures we don't have any duplicate names in our file list.
1413  * duplicate names can cause corruption because of the pipelining
1414  */
1415 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1416 {
1417         int i, prev_i = 0;
1418
1419         if (!flist || flist->count == 0)
1420                 return;
1421
1422         qsort(flist->files, flist->count,
1423             sizeof flist->files[0], (int (*)()) file_compare);
1424
1425         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1426                 if (flist->files[i]->basename) {
1427                         prev_i = i;
1428                         break;
1429                 }
1430         }
1431         while (++i < flist->count) {
1432                 if (!flist->files[i]->basename)
1433                         continue;
1434                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1435                         if (verbose > 1 && !am_server) {
1436                                 rprintf(FINFO,
1437                                         "removing duplicate name %s from file list %d\n",
1438                                         f_name(flist->files[i]), i);
1439                         }
1440                         /* Make sure that if we unduplicate '.', that we don't
1441                          * lose track of a user-specified starting point (or
1442                          * else deletions will mysteriously fail with -R). */
1443                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1444                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1445
1446                         clear_file(i, flist);
1447                 } else
1448                         prev_i = i;
1449         }
1450
1451         if (strip_root) {
1452                 /* we need to strip off the root directory in the case
1453                    of relative paths, but this must be done _after_
1454                    the sorting phase */
1455                 for (i = 0; i < flist->count; i++) {
1456                         if (flist->files[i]->dirname &&
1457                             flist->files[i]->dirname[0] == '/') {
1458                                 memmove(&flist->files[i]->dirname[0],
1459                                         &flist->files[i]->dirname[1],
1460                                         strlen(flist->files[i]->dirname));
1461                         }
1462
1463                         if (flist->files[i]->dirname &&
1464                             !flist->files[i]->dirname[0]) {
1465                                 flist->files[i]->dirname = NULL;
1466                         }
1467                 }
1468         }
1469 }
1470
1471 static void output_flist(struct file_list *flist)
1472 {
1473         char uidbuf[16], gidbuf[16];
1474         struct file_struct *file;
1475         int i;
1476
1477         for (i = 0; i < flist->count; i++) {
1478                 file = flist->files[i];
1479                 if (am_root && preserve_uid)
1480                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1481                 else
1482                         *uidbuf = '\0';
1483                 if (preserve_gid && file->gid != GID_NONE)
1484                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1485                 else
1486                         *gidbuf = '\0';
1487                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1488                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1489                         NS(file->basename), (int) file->mode,
1490                         (double) file->length, uidbuf, gidbuf);
1491         }
1492 }
1493
1494
1495 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1496
1497 /* Compare the names of two file_struct entities, just like strcmp()
1498  * would do if it were operating on the joined strings.  We assume
1499  * that there are no 0-length strings.
1500  */
1501 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1502 {
1503         int dif;
1504         const uchar *c1, *c2;
1505         enum fnc_state state1, state2;
1506
1507         if (!f1 || !f1->basename) {
1508                 if (!f2 || !f2->basename)
1509                         return 0;
1510                 return -1;
1511         }
1512         if (!f2 || !f2->basename)
1513                 return 1;
1514
1515         if (!(c1 = (uchar*)f1->dirname)) {
1516                 state1 = fnc_BASE;
1517                 c1 = (uchar*)f1->basename;
1518         } else if (!*c1) {
1519                 state1 = fnc_SLASH;
1520                 c1 = (uchar*)"/";
1521         } else
1522                 state1 = fnc_DIR;
1523         if (!(c2 = (uchar*)f2->dirname)) {
1524                 state2 = fnc_BASE;
1525                 c2 = (uchar*)f2->basename;
1526         } else if (!*c2) {
1527                 state2 = fnc_SLASH;
1528                 c2 = (uchar*)"/";
1529         } else
1530                 state2 = fnc_DIR;
1531
1532         while (1) {
1533                 if ((dif = (int)*c1 - (int)*c2) != 0)
1534                         break;
1535                 if (!*++c1) {
1536                         switch (state1) {
1537                         case fnc_DIR:
1538                                 state1 = fnc_SLASH;
1539                                 c1 = (uchar*)"/";
1540                                 break;
1541                         case fnc_SLASH:
1542                                 state1 = fnc_BASE;
1543                                 c1 = (uchar*)f1->basename;
1544                                 break;
1545                         case fnc_BASE:
1546                                 break;
1547                         }
1548                 }
1549                 if (!*++c2) {
1550                         switch (state2) {
1551                         case fnc_DIR:
1552                                 state2 = fnc_SLASH;
1553                                 c2 = (uchar*)"/";
1554                                 break;
1555                         case fnc_SLASH:
1556                                 state2 = fnc_BASE;
1557                                 c2 = (uchar*)f2->basename;
1558                                 break;
1559                         case fnc_BASE:
1560                                 if (!*c1)
1561                                         return 0;
1562                                 break;
1563                         }
1564                 }
1565         }
1566
1567         return dif;
1568 }
1569
1570
1571 /* Return a copy of the full filename of a flist entry, using the indicated
1572  * buffer.  No size-checking is done because we checked the size when creating
1573  * the file_struct entry.
1574  */
1575 char *f_name_to(struct file_struct *f, char *fbuf)
1576 {
1577         if (!f || !f->basename)
1578                 return NULL;
1579
1580         if (f->dirname) {
1581                 int len = strlen(f->dirname);
1582                 memcpy(fbuf, f->dirname, len);
1583                 fbuf[len] = '/';
1584                 strcpy(fbuf + len + 1, f->basename);
1585         } else
1586                 strcpy(fbuf, f->basename);
1587         return fbuf;
1588 }
1589
1590
1591 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1592  */
1593 char *f_name(struct file_struct *f)
1594 {
1595         static char names[5][MAXPATHLEN];
1596         static unsigned int n;
1597
1598         n = (n + 1) % (sizeof names / sizeof names[0]);
1599
1600         return f_name_to(f, names[n]);
1601 }