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 always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40
  41 extern int cvs_exclude;
  42
  43 extern int recurse;
  44 extern char curr_dir[MAXPATHLEN];
  45 extern char *files_from;
  46 extern int filesfrom_fd;
  47
  48 extern int one_file_system;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_perms;
  52 extern int preserve_devices;
  53 extern int preserve_uid;
  54 extern int preserve_gid;
  55 extern int preserve_times;
  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_struct **exclude_list;
  67 extern struct exclude_struct **server_exclude_list;
  68 extern struct exclude_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 #if 0 /* This currently never happens, so avoid a useless compare. */
 214         if (exclude_level == NO_EXCLUDES)
 215                 return 0;
 216 #endif
 217         if (fname) {
 218                 /* never exclude '.', even if somebody does --exclude '*' */
 219                 if (fname[0] == '.' && !fname[1])
 220                         return 0;
 221                 /* Handle the -R version of the '.' dir. */
 222                 if (fname[0] == '/') {
 223                         int len = strlen(fname);
 224                         if (fname[len-1] == '.' && fname[len-2] == '/')
 225                                 return 0;
 226                 }
 227         }
 228         if (server_exclude_list
 229          && check_exclude(server_exclude_list, fname, is_dir))
 230                 return 1;
 231         if (exclude_level != ALL_EXCLUDES)
 232                 return 0;
 233         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 234                 return 1;
 235         if (local_exclude_list
 236          && check_exclude(local_exclude_list, fname, is_dir))
 237                 return 1;
 238         return 0;
 239 }
 240
 241 /* used by the one_file_system code */
 242 static dev_t filesystem_dev;
 243
 244 static void set_filesystem(char *fname)
 245 {
 246         STRUCT_STAT st;
 247         if (link_stat(fname, &st) != 0)
 248                 return;
 249         filesystem_dev = st.st_dev;
 250 }
 251
 252
 253 static int to_wire_mode(mode_t mode)
 254 {
 255 #if SUPPORT_LINKS
 256         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 257                 return (mode & ~(_S_IFMT)) | 0120000;
 258 #endif
 259         return (int) mode;
 260 }
 261
 262 static mode_t from_wire_mode(int mode)
 263 {
 264         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 265                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 266         return (mode_t) mode;
 267 }
 268
 269
 270 static void send_directory(int f, struct file_list *flist, char *dir);
 271
 272 static char *flist_dir;
 273 static int flist_dir_len;
 274
 275
 276 /**
 277  * Make sure @p flist is big enough to hold at least @p flist->count
 278  * entries.
 279  **/
 280 void flist_expand(struct file_list *flist)
 281 {
 282         void *new_ptr;
 283
 284         if (flist->count < flist->malloced)
 285                 return;
 286
 287         if (flist->malloced < FLIST_START)
 288                 flist->malloced = FLIST_START;
 289         else if (flist->malloced >= FLIST_LINEAR)
 290                 flist->malloced += FLIST_LINEAR;
 291         else
 292                 flist->malloced *= 2;
 293
 294         /*
 295          * In case count jumped or we are starting the list
 296          * with a known size just set it.
 297          */
 298         if (flist->malloced < flist->count)
 299                 flist->malloced = flist->count;
 300
 301         if (flist->files) {
 302                 new_ptr = realloc_array(flist->files,
 303                     struct file_struct *, flist->malloced);
 304         } else {
 305                 new_ptr = new_array(struct file_struct *, flist->malloced);
 306         }
 307
 308         if (verbose >= 2) {
 309                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 310                     who_am_i(),
 311                     (double) sizeof flist->files[0] * flist->malloced,
 312                     (new_ptr == flist->files) ? " not" : "");
 313         }
 314
 315         flist->files = (struct file_struct **) new_ptr;
 316
 317         if (!flist->files)
 318                 out_of_memory("flist_expand");
 319 }
 320
 321 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 322 {
 323         unsigned short flags;
 324         static time_t modtime;
 325         static mode_t mode;
 326         static DEV64_T rdev, rdev_high;
 327         static DEV64_T dev;
 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                 rdev = 0, rdev_high = 0, dev = 0;
 341                 uid = 0, gid = 0;
 342                 *lastname = '\0';
 343                 return;
 344         }
 345
 346         io_write_phase = "send_file_entry";
 347
 348         fname = f_name_to(file, fbuf);
 349
 350         flags = base_flags;
 351
 352         if (file->mode == mode)
 353                 flags |= XMIT_SAME_MODE;
 354         else
 355                 mode = file->mode;
 356         if (preserve_devices) {
 357                 if (protocol_version < 28) {
 358                         if (IS_DEVICE(mode)) {
 359                                 if (file->u.rdev == rdev) {
 360                                         /* Set both flags to simplify the test
 361                                          * when writing the data. */
 362                                         flags |= XMIT_SAME_RDEV_pre28
 363                                             | XMIT_SAME_HIGH_RDEV;
 364                                 } else
 365                                         rdev = file->u.rdev;
 366                         } else
 367                                 rdev = 0;
 368                 } else if (IS_DEVICE(mode)) {
 369                         if ((file->u.rdev & ~0xFF) == rdev_high)
 370                                 flags |= XMIT_SAME_HIGH_RDEV;
 371                         else {
 372                                 rdev = file->u.rdev;
 373                                 rdev_high = rdev & ~0xFF;
 374                         }
 375                 }
 376         }
 377         if (file->uid == uid)
 378                 flags |= XMIT_SAME_UID;
 379         else
 380                 uid = file->uid;
 381         if (file->gid == gid)
 382                 flags |= XMIT_SAME_GID;
 383         else
 384                 gid = file->gid;
 385         if (file->modtime == modtime)
 386                 flags |= XMIT_SAME_TIME;
 387         else
 388                 modtime = file->modtime;
 389
 390 #if SUPPORT_HARD_LINKS
 391         if (file->link_u.idev) {
 392                 if (file->F_DEV == dev) {
 393                         if (protocol_version >= 28)
 394                                 flags |= XMIT_SAME_DEV;
 395                 } else
 396                         dev = file->F_DEV;
 397                 flags |= XMIT_HAS_IDEV_DATA;
 398         }
 399 #endif
 400
 401         for (l1 = 0;
 402             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 403             l1++) {}
 404         l2 = strlen(fname+l1);
 405
 406         if (l1 > 0)
 407                 flags |= XMIT_SAME_NAME;
 408         if (l2 > 255)
 409                 flags |= XMIT_LONG_NAME;
 410
 411         /* We must make sure we don't send a zero flag byte or the
 412          * other end will terminate the flist transfer.  Note that
 413          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 414          * it's harmless way to add a bit to the first flag byte. */
 415         if (protocol_version >= 28) {
 416                 if (!flags && !S_ISDIR(mode))
 417                         flags |= XMIT_TOP_DIR;
 418                 if ((flags & 0xFF00) || !flags) {
 419                         flags |= XMIT_EXTENDED_FLAGS;
 420                         write_byte(f, flags);
 421                         write_byte(f, flags >> 8);
 422                 } else
 423                         write_byte(f, flags);
 424         } else {
 425                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 426                         flags |= XMIT_TOP_DIR;
 427                 if (!(flags & 0xFF))
 428                         flags |= XMIT_LONG_NAME;
 429                 write_byte(f, flags);
 430         }
 431         if (flags & XMIT_SAME_NAME)
 432                 write_byte(f, l1);
 433         if (flags & XMIT_LONG_NAME)
 434                 write_int(f, l2);
 435         else
 436                 write_byte(f, l2);
 437         write_buf(f, fname + l1, l2);
 438
 439         write_longint(f, file->length);
 440         if (!(flags & XMIT_SAME_TIME))
 441                 write_int(f, modtime);
 442         if (!(flags & XMIT_SAME_MODE))
 443                 write_int(f, to_wire_mode(mode));
 444         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 445                 if (!numeric_ids)
 446                         add_uid(uid);
 447                 write_int(f, uid);
 448         }
 449         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 450                 if (!numeric_ids)
 451                         add_gid(gid);
 452                 write_int(f, gid);
 453         }
 454         if (preserve_devices && IS_DEVICE(mode)) {
 455                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 456                  * also off. */
 457                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 458                         write_int(f, rdev);
 459                 else if (protocol_version >= 28)
 460                         write_byte(f, rdev);
 461         }
 462
 463 #if SUPPORT_LINKS
 464         if (preserve_links && S_ISLNK(mode)) {
 465                 int len = strlen(file->u.link);
 466                 write_int(f, len);
 467                 write_buf(f, file->u.link, len);
 468         }
 469 #endif
 470
 471 #if SUPPORT_HARD_LINKS
 472         if (flags & XMIT_HAS_IDEV_DATA) {
 473                 if (protocol_version < 26) {
 474                         /* 32-bit dev_t and ino_t */
 475                         write_int(f, dev);
 476                         write_int(f, file->F_INODE);
 477                 } else {
 478                         /* 64-bit dev_t and ino_t */
 479                         if (!(flags & XMIT_SAME_DEV))
 480                                 write_longint(f, dev);
 481                         write_longint(f, file->F_INODE);
 482                 }
 483         }
 484 #endif
 485
 486         if (always_checksum) {
 487                 char *sum;
 488                 if (S_ISREG(mode))
 489                         sum = file->u.sum;
 490                 else if (protocol_version < 28) {
 491                         /* Prior to 28, we sent a useless set of nulls. */
 492                         sum = empty_sum;
 493                 } else
 494                         sum = NULL;
 495                 if (sum) {
 496                         write_buf(f, sum,
 497                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 498                 }
 499         }
 500
 501         strlcpy(lastname, fname, MAXPATHLEN);
 502
 503         io_write_phase = "unknown";
 504 }
 505
 506
 507
 508 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 509     struct file_list *flist, int f)
 510 {
 511         static time_t modtime;
 512         static mode_t mode;
 513         static DEV64_T rdev, rdev_high;
 514         static DEV64_T dev;
 515         static uid_t uid;
 516         static gid_t gid;
 517         static char lastname[MAXPATHLEN], *lastdir;
 518         static int lastdir_len = -1;
 519         char thisname[MAXPATHLEN];
 520         unsigned int l1 = 0, l2 = 0;
 521         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 522         OFF_T file_length;
 523         char *basename, *dirname, *bp;
 524         struct file_struct *file;
 525
 526         if (!fptr) {
 527                 modtime = 0, mode = 0;
 528                 rdev = 0, rdev_high = 0, dev = 0;
 529                 uid = 0, gid = 0;
 530                 *lastname = '\0';
 531                 return;
 532         }
 533
 534         if (flags & XMIT_SAME_NAME)
 535                 l1 = read_byte(f);
 536
 537         if (flags & XMIT_LONG_NAME)
 538                 l2 = read_int(f);
 539         else
 540                 l2 = read_byte(f);
 541
 542         if (l2 >= MAXPATHLEN - l1) {
 543                 rprintf(FERROR,
 544                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 545                         flags, l1, l2, lastname);
 546                 overflow("receive_file_entry");
 547         }
 548
 549         strlcpy(thisname, lastname, l1 + 1);
 550         read_sbuf(f, &thisname[l1], l2);
 551         thisname[l1 + l2] = 0;
 552
 553         strlcpy(lastname, thisname, MAXPATHLEN);
 554
 555         clean_fname(thisname);
 556
 557         if (sanitize_paths)
 558                 sanitize_path(thisname, NULL);
 559
 560         if ((basename = strrchr(thisname, '/')) != NULL) {
 561                 dirname_len = ++basename - thisname; /* counts future '\0' */
 562                 if (lastdir_len == dirname_len - 1
 563                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 564                         dirname = lastdir;
 565                         dirname_len = 0; /* indicates no copy is needed */
 566                 } else
 567                         dirname = thisname;
 568         } else {
 569                 basename = thisname;
 570                 dirname = NULL;
 571                 dirname_len = 0;
 572         }
 573         basename_len = strlen(basename) + 1; /* count the '\0' */
 574
 575         file_length = read_longint(f);
 576         if (!(flags & XMIT_SAME_TIME))
 577                 modtime = (time_t)read_int(f);
 578         if (!(flags & XMIT_SAME_MODE))
 579                 mode = from_wire_mode(read_int(f));
 580
 581         if (preserve_uid && !(flags & XMIT_SAME_UID))
 582                 uid = (uid_t)read_int(f);
 583         if (preserve_gid && !(flags & XMIT_SAME_GID))
 584                 gid = (gid_t)read_int(f);
 585
 586         if (preserve_devices) {
 587                 if (protocol_version < 28) {
 588                         if (IS_DEVICE(mode)) {
 589                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 590                                         rdev = (DEV64_T)read_int(f);
 591                         } else
 592                                 rdev = 0;
 593                 } else if (IS_DEVICE(mode)) {
 594                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 595                                 rdev = (DEV64_T)read_int(f);
 596                                 rdev_high = rdev & ~0xFF;
 597                         } else
 598                                 rdev = rdev_high | (DEV64_T)read_byte(f);
 599                 }
 600         }
 601
 602 #if SUPPORT_LINKS
 603         if (preserve_links && S_ISLNK(mode)) {
 604                 linkname_len = read_int(f) + 1; /* count the '\0' */
 605                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 606                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 607                                 linkname_len - 1);
 608                         overflow("receive_file_entry");
 609                 }
 610         }
 611         else
 612 #endif
 613                 linkname_len = 0;
 614
 615         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 616
 617         alloc_len = file_struct_len + dirname_len + basename_len
 618                   + linkname_len + sum_len;
 619         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 620
 621         file = *fptr = (struct file_struct *)bp;
 622         memset(bp, 0, file_struct_len);
 623         bp += file_struct_len;
 624
 625         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 626         file->modtime = modtime;
 627         file->length = file_length;
 628         file->mode = mode;
 629         file->uid = uid;
 630         file->gid = gid;
 631
 632         if (dirname_len) {
 633                 file->dirname = lastdir = bp;
 634                 lastdir_len = dirname_len - 1;
 635                 memcpy(bp, dirname, dirname_len - 1);
 636                 bp += dirname_len;
 637                 bp[-1] = '\0';
 638         } else if (dirname)
 639                 file->dirname = dirname;
 640
 641         file->basename = bp;
 642         memcpy(bp, basename, basename_len);
 643         bp += basename_len;
 644
 645         if (preserve_devices && IS_DEVICE(mode))
 646                 file->u.rdev = rdev;
 647
 648 #if SUPPORT_LINKS
 649         if (linkname_len) {
 650                 file->u.link = bp;
 651                 read_sbuf(f, bp, linkname_len - 1);
 652                 if (sanitize_paths)
 653                         sanitize_path(bp, lastdir);
 654                 bp += linkname_len;
 655         }
 656 #endif
 657
 658 #if SUPPORT_HARD_LINKS
 659         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 660                 flags |= XMIT_HAS_IDEV_DATA;
 661         if (flags & XMIT_HAS_IDEV_DATA) {
 662                 INO64_T inode;
 663                 if (protocol_version < 26) {
 664                         dev = read_int(f);
 665                         inode = read_int(f);
 666                 } else {
 667                         if (!(flags & XMIT_SAME_DEV))
 668                                 dev = read_longint(f);
 669                         inode = read_longint(f);
 670                 }
 671                 if (flist->hlink_pool) {
 672                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 673                             struct idev, 1, "inode_table");
 674                         file->F_INODE = inode;
 675                         file->F_DEV = dev;
 676                 }
 677         }
 678 #endif
 679
 680         if (always_checksum) {
 681                 char *sum;
 682                 if (sum_len) {
 683                         file->u.sum = sum = bp;
 684                         /*bp += sum_len;*/
 685                 } else if (protocol_version < 28) {
 686                         /* Prior to 28, we get a useless set of nulls. */
 687                         sum = empty_sum;
 688                 } else
 689                         sum = NULL;
 690                 if (sum) {
 691                         read_buf(f, sum,
 692                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 693                 }
 694         }
 695
 696         if (!preserve_perms) {
 697                 extern int orig_umask;
 698                 /* set an appropriate set of permissions based on original
 699                  * permissions and umask. This emulates what GNU cp does */
 700                 file->mode &= ~orig_umask;
 701         }
 702 }
 703
 704
 705 /**
 706  * Create a file_struct for a named file by reading its stat()
 707  * information and performing extensive checks against global
 708  * options.
 709  *
 710  * @return the new file, or NULL if there was an error or this file
 711  * should be excluded.
 712  *
 713  * @todo There is a small optimization opportunity here to avoid
 714  * stat()ing the file in some circumstances, which has a certain cost.
 715  * We are called immediately after doing readdir(), and so we may
 716  * already know the d_type of the file.  We could for example avoid
 717  * statting directories if we're not recursing, but this is not a very
 718  * important case.  Some systems may not have d_type.
 719  **/
 720 struct file_struct *make_file(char *fname,
 721     struct file_list *flist, int exclude_level)
 722 {
 723         static char *lastdir;
 724         static int lastdir_len = -1;
 725         struct file_struct *file;
 726         STRUCT_STAT st;
 727         char sum[SUM_LENGTH];
 728         char thisname[MAXPATHLEN];
 729         char linkname[MAXPATHLEN];
 730         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 731         char *basename, *dirname, *bp;
 732         unsigned short flags = 0;
 733
 734         if (!flist)     /* lastdir isn't valid if flist is NULL */
 735                 lastdir_len = -1;
 736
 737         if (strlcpy(thisname, fname, sizeof thisname)
 738             >= sizeof thisname - flist_dir_len) {
 739                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 740                 return NULL;
 741         }
 742         clean_fname(thisname);
 743         if (sanitize_paths)
 744                 sanitize_path(thisname, NULL);
 745
 746         memset(sum, 0, SUM_LENGTH);
 747
 748         if (readlink_stat(thisname, &st, linkname) != 0) {
 749                 int save_errno = errno;
 750                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 751                         /* either symlink pointing nowhere or file that
 752                          * was removed during rsync run; see if excluded
 753                          * before reporting an error */
 754                         if (check_exclude_file(thisname, 0, exclude_level)) {
 755                                 /* file is excluded anyway, ignore silently */
 756                                 return NULL;
 757                         }
 758                 }
 759                 io_error |= IOERR_GENERAL;
 760                 rprintf(FERROR, "readlink %s failed: %s\n",
 761                         full_fname(thisname), strerror(save_errno));
 762                 return NULL;
 763         }
 764
 765         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 766         if (exclude_level == NO_EXCLUDES)
 767                 goto skip_excludes;
 768
 769         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 770                 rprintf(FINFO, "skipping directory %s\n", thisname);
 771                 return NULL;
 772         }
 773
 774         /* We only care about directories because we need to avoid recursing
 775          * into a mount-point directory, not to avoid copying a symlinked
 776          * file if -L (or similar) was specified. */
 777         if (one_file_system && st.st_dev != filesystem_dev
 778             && S_ISDIR(st.st_mode))
 779                 flags |= FLAG_MOUNT_POINT;
 780
 781         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 782                 return NULL;
 783
 784         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 785                 return NULL;
 786
 787 skip_excludes:
 788
 789         if (verbose > 2) {
 790                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 791                         who_am_i(), thisname, exclude_level);
 792         }
 793
 794         if ((basename = strrchr(thisname, '/')) != NULL) {
 795                 dirname_len = ++basename - thisname; /* counts future '\0' */
 796                 if (lastdir_len == dirname_len - 1
 797                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 798                         dirname = lastdir;
 799                         dirname_len = 0; /* indicates no copy is needed */
 800                 } else
 801                         dirname = thisname;
 802         } else {
 803                 basename = thisname;
 804                 dirname = NULL;
 805                 dirname_len = 0;
 806         }
 807         basename_len = strlen(basename) + 1; /* count the '\0' */
 808
 809 #if SUPPORT_LINKS
 810         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 811 #else
 812         linkname_len = 0;
 813 #endif
 814
 815         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 816
 817         alloc_len = file_struct_len + dirname_len + basename_len
 818             + linkname_len + sum_len;
 819         if (flist) {
 820                 bp = pool_alloc(flist->file_pool, alloc_len,
 821                     "receive_file_entry");
 822         } else {
 823                 if (!(bp = new_array(char, alloc_len)))
 824                         out_of_memory("receive_file_entry");
 825         }
 826
 827         file = (struct file_struct *)bp;
 828         memset(bp, 0, file_struct_len);
 829         bp += file_struct_len;
 830
 831         file->flags = flags;
 832         file->modtime = st.st_mtime;
 833         file->length = st.st_size;
 834         file->mode = st.st_mode;
 835         file->uid = st.st_uid;
 836         file->gid = st.st_gid;
 837
 838 #if SUPPORT_HARD_LINKS
 839         if (flist && flist->hlink_pool) {
 840                 if (protocol_version < 28) {
 841                         if (S_ISREG(st.st_mode))
 842                                 file->link_u.idev = pool_talloc(
 843                                     flist->hlink_pool, struct idev, 1,
 844                                     "inode_table");
 845                 } else {
 846                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 847                                 file->link_u.idev = pool_talloc(
 848                                     flist->hlink_pool, struct idev, 1,
 849                                     "inode_table");
 850                 }
 851         }
 852         if (file->link_u.idev) {
 853                 file->F_DEV = st.st_dev;
 854                 file->F_INODE = st.st_ino;
 855         }
 856 #endif
 857
 858         if (dirname_len) {
 859                 file->dirname = lastdir = bp;
 860                 lastdir_len = dirname_len - 1;
 861                 memcpy(bp, dirname, dirname_len - 1);
 862                 bp += dirname_len;
 863                 bp[-1] = '\0';
 864         } else if (dirname)
 865                 file->dirname = dirname;
 866
 867         file->basename = bp;
 868         memcpy(bp, basename, basename_len);
 869         bp += basename_len;
 870
 871 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 872         if (preserve_devices && IS_DEVICE(st.st_mode))
 873                 file->u.rdev = st.st_rdev;
 874 #endif
 875
 876 #if SUPPORT_LINKS
 877         if (linkname_len) {
 878                 file->u.link = bp;
 879                 memcpy(bp, linkname, linkname_len);
 880                 bp += linkname_len;
 881         }
 882 #endif
 883
 884         if (sum_len) {
 885                 file->u.sum = bp;
 886                 file_checksum(thisname, bp, st.st_size);
 887                 /*bp += sum_len;*/
 888         }
 889
 890         file->basedir = flist_dir;
 891
 892         if (!S_ISDIR(st.st_mode))
 893                 stats.total_size += st.st_size;
 894
 895         return file;
 896 }
 897
 898
 899 void send_file_name(int f, struct file_list *flist, char *fname,
 900                     int recursive, unsigned short base_flags)
 901 {
 902         struct file_struct *file;
 903         char fbuf[MAXPATHLEN];
 904         extern int delete_excluded;
 905
 906         /* f is set to -1 when calculating deletion file list */
 907         file = make_file(fname, flist,
 908             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 909
 910         if (!file)
 911                 return;
 912
 913         maybe_emit_filelist_progress(flist);
 914
 915         flist_expand(flist);
 916
 917         if (write_batch)
 918                 file->flags |= FLAG_TOP_DIR;
 919
 920         if (file->basename[0]) {
 921                 flist->files[flist->count++] = file;
 922                 send_file_entry(file, f, base_flags);
 923         }
 924
 925         if (recursive && S_ISDIR(file->mode)
 926             && !(file->flags & FLAG_MOUNT_POINT)) {
 927                 struct exclude_struct **last_exclude_list = local_exclude_list;
 928                 send_directory(f, flist, f_name_to(file, fbuf));
 929                 local_exclude_list = last_exclude_list;
 930                 return;
 931         }
 932 }
 933
 934
 935 static void send_directory(int f, struct file_list *flist, char *dir)
 936 {
 937         DIR *d;
 938         struct dirent *di;
 939         char fname[MAXPATHLEN];
 940         unsigned int offset;
 941         char *p;
 942
 943         d = opendir(dir);
 944         if (!d) {
 945                 io_error |= IOERR_GENERAL;
 946                 rprintf(FERROR, "opendir %s failed: %s\n",
 947                         full_fname(dir), strerror(errno));
 948                 return;
 949         }
 950
 951         offset = strlcpy(fname, dir, MAXPATHLEN);
 952         p = fname + offset;
 953         if (offset >= MAXPATHLEN || p[-1] != '/') {
 954                 if (offset >= MAXPATHLEN - 1) {
 955                         io_error |= IOERR_GENERAL;
 956                         rprintf(FERROR, "skipping long-named directory: %s\n",
 957                                 full_fname(fname));
 958                         closedir(d);
 959                         return;
 960                 }
 961                 *p++ = '/';
 962                 offset++;
 963         }
 964
 965         local_exclude_list = NULL;
 966
 967         if (cvs_exclude) {
 968                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 969                     < MAXPATHLEN - offset)
 970                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 971                 else {
 972                         io_error |= IOERR_GENERAL;
 973                         rprintf(FINFO,
 974                                 "cannot cvs-exclude in long-named directory %s\n",
 975                                 full_fname(fname));
 976                 }
 977         }
 978
 979         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 980                 char *dname = d_name(di);
 981                 if (dname[0] == '.' && (dname[1] == '\0'
 982                     || (dname[1] == '.' && dname[2] == '\0')))
 983                         continue;
 984                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 985                         send_file_name(f, flist, fname, recurse, 0);
 986                 else {
 987                         io_error |= IOERR_GENERAL;
 988                         rprintf(FINFO,
 989                                 "cannot send long-named file %s\n",
 990                                 full_fname(fname));
 991                 }
 992         }
 993         if (errno) {
 994                 io_error |= IOERR_GENERAL;
 995                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 996                         dir, errno, strerror(errno));
 997         }
 998
 999         if (local_exclude_list)
1000                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1001
1002         closedir(d);
1003 }
1004
1005
1006 /**
1007  * The delete_files() function in receiver.c sets f to -1 so that we just
1008  * construct the file list in memory without sending it over the wire.  It
1009  * also has the side-effect of ignoring user-excludes if delete_excluded
1010  * is set (so that the delete list includes user-excluded files).
1011  **/
1012 struct file_list *send_file_list(int f, int argc, char *argv[])
1013 {
1014         int l;
1015         STRUCT_STAT st;
1016         char *p, *dir, olddir[sizeof curr_dir];
1017         char lastpath[MAXPATHLEN] = "";
1018         struct file_list *flist;
1019         int64 start_write;
1020         int use_ff_fd = 0;
1021
1022         if (show_filelist_p() && f != -1)
1023                 start_filelist_progress("building file list");
1024
1025         start_write = stats.total_written;
1026
1027         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1028             "send_file_list");
1029
1030         if (f != -1) {
1031                 io_start_buffering_out(f);
1032                 if (filesfrom_fd >= 0) {
1033                         if (argv[0] && !push_dir(argv[0])) {
1034                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1035                                         full_fname(argv[0]), strerror(errno));
1036                                 exit_cleanup(RERR_FILESELECT);
1037                         }
1038                         use_ff_fd = 1;
1039                 }
1040         }
1041
1042         while (1) {
1043                 char fname2[MAXPATHLEN];
1044                 char *fname = fname2;
1045
1046                 if (use_ff_fd) {
1047                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1048                                 break;
1049                         sanitize_path(fname, NULL);
1050                 } else {
1051                         if (argc-- == 0)
1052                                 break;
1053                         strlcpy(fname, *argv++, MAXPATHLEN);
1054                         if (sanitize_paths)
1055                                 sanitize_path(fname, NULL);
1056                 }
1057
1058                 l = strlen(fname);
1059                 if (fname[l - 1] == '/') {
1060                         if (l == 2 && fname[0] == '.') {
1061                                 /* Turn "./" into just "." rather than "./." */
1062                                 fname[1] = '\0';
1063                         } else if (l < MAXPATHLEN) {
1064                                 fname[l++] = '.';
1065                                 fname[l] = '\0';
1066                         }
1067                 }
1068
1069                 if (link_stat(fname, &st) != 0) {
1070                         if (f != -1) {
1071                                 io_error |= IOERR_GENERAL;
1072                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1073                                         full_fname(fname), strerror(errno));
1074                         }
1075                         continue;
1076                 }
1077
1078                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1079                         rprintf(FINFO, "skipping directory %s\n", fname);
1080                         continue;
1081                 }
1082
1083                 dir = NULL;
1084                 olddir[0] = '\0';
1085
1086                 if (!relative_paths) {
1087                         p = strrchr(fname, '/');
1088                         if (p) {
1089                                 *p = 0;
1090                                 if (p == fname)
1091                                         dir = "/";
1092                                 else
1093                                         dir = fname;
1094                                 fname = p + 1;
1095                         }
1096                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1097                         /* this ensures we send the intermediate directories,
1098                            thus getting their permissions right */
1099                         char *lp = lastpath, *fn = fname, *slash = fname;
1100                         *p = 0;
1101                         /* Skip any initial directories in our path that we
1102                          * have in common with lastpath. */
1103                         while (*fn && *lp == *fn) {
1104                                 if (*fn == '/')
1105                                         slash = fn;
1106                                 lp++, fn++;
1107                         }
1108                         *p = '/';
1109                         if (fn != p || (*lp && *lp != '/')) {
1110                                 int copy_links_saved = copy_links;
1111                                 int recurse_saved = recurse;
1112                                 copy_links = copy_unsafe_links;
1113                                 /* set recurse to 1 to prevent make_file
1114                                  * from ignoring directory, but still
1115                                  * turn off the recursive parameter to
1116                                  * send_file_name */
1117                                 recurse = 1;
1118                                 while ((slash = strchr(slash+1, '/')) != 0) {
1119                                         *slash = 0;
1120                                         send_file_name(f, flist, fname, 0, 0);
1121                                         *slash = '/';
1122                                 }
1123                                 copy_links = copy_links_saved;
1124                                 recurse = recurse_saved;
1125                                 *p = 0;
1126                                 strlcpy(lastpath, fname, sizeof lastpath);
1127                                 *p = '/';
1128                         }
1129                 }
1130
1131                 if (!*fname)
1132                         fname = ".";
1133
1134                 if (dir && *dir) {
1135                         static char *lastdir;
1136                         static int lastdir_len;
1137
1138                         strcpy(olddir, curr_dir); /* can't overflow */
1139
1140                         if (!push_dir(dir)) {
1141                                 io_error |= IOERR_GENERAL;
1142                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1143                                         full_fname(dir), strerror(errno));
1144                                 continue;
1145                         }
1146
1147                         if (lastdir && strcmp(lastdir, dir) == 0) {
1148                                 flist_dir = lastdir;
1149                                 flist_dir_len = lastdir_len;
1150                         } else {
1151                                 flist_dir = lastdir = strdup(dir);
1152                                 flist_dir_len = lastdir_len = strlen(dir);
1153                         }
1154                 }
1155
1156                 if (one_file_system)
1157                         set_filesystem(fname);
1158
1159                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1160
1161                 if (olddir[0]) {
1162                         flist_dir = NULL;
1163                         flist_dir_len = 0;
1164                         if (!pop_dir(olddir)) {
1165                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1166                                         full_fname(dir), strerror(errno));
1167                                 exit_cleanup(RERR_FILESELECT);
1168                         }
1169                 }
1170         }
1171
1172         if (f != -1) {
1173                 send_file_entry(NULL, f, 0);
1174
1175                 if (show_filelist_p())
1176                         finish_filelist_progress(flist);
1177         }
1178
1179         if (flist->hlink_pool) {
1180                 pool_destroy(flist->hlink_pool);
1181                 flist->hlink_pool = NULL;
1182         }
1183
1184         clean_flist(flist, 0, 0);
1185
1186         if (f != -1) {
1187                 /* Now send the uid/gid list. This was introduced in
1188                  * protocol version 15 */
1189                 send_uid_list(f);
1190
1191                 /* send the io_error flag */
1192                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1193
1194                 io_end_buffering();
1195                 stats.flist_size = stats.total_written - start_write;
1196                 stats.num_files = flist->count;
1197                 if (write_batch)
1198                         write_batch_flist_info(flist->count, flist->files);
1199         }
1200
1201         if (verbose > 3)
1202                 output_flist(flist);
1203
1204         if (verbose > 2)
1205                 rprintf(FINFO, "send_file_list done\n");
1206
1207         return flist;
1208 }
1209
1210
1211 struct file_list *recv_file_list(int f)
1212 {
1213         struct file_list *flist;
1214         unsigned short flags;
1215         int64 start_read;
1216         extern int list_only;
1217
1218         if (show_filelist_p())
1219                 start_filelist_progress("receiving file list");
1220
1221         start_read = stats.total_read;
1222
1223         flist = flist_new(WITH_HLINK, "recv_file_list");
1224
1225         flist->count = 0;
1226         flist->malloced = 1000;
1227         flist->files = new_array(struct file_struct *, flist->malloced);
1228         if (!flist->files)
1229                 goto oom;
1230
1231
1232         while ((flags = read_byte(f)) != 0) {
1233                 int i = flist->count;
1234
1235                 flist_expand(flist);
1236
1237                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1238                         flags |= read_byte(f) << 8;
1239                 receive_file_entry(&flist->files[i], flags, flist, f);
1240
1241                 if (S_ISREG(flist->files[i]->mode))
1242                         stats.total_size += flist->files[i]->length;
1243
1244                 flist->count++;
1245
1246                 maybe_emit_filelist_progress(flist);
1247
1248                 if (verbose > 2) {
1249                         rprintf(FINFO, "recv_file_name(%s)\n",
1250                                 f_name(flist->files[i]));
1251                 }
1252         }
1253         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1254
1255         if (verbose > 2)
1256                 rprintf(FINFO, "received %d names\n", flist->count);
1257
1258         if (show_filelist_p())
1259                 finish_filelist_progress(flist);
1260
1261         clean_flist(flist, relative_paths, 1);
1262
1263         if (f != -1) {
1264                 /* Now send the uid/gid list. This was introduced in
1265                  * protocol version 15 */
1266                 recv_uid_list(f, flist);
1267
1268                 if (!read_batch) {
1269                         /* Recv the io_error flag */
1270                         if (lp_ignore_errors(module_id) || ignore_errors)
1271                                 read_int(f);
1272                         else
1273                                 io_error |= read_int(f);
1274                 }
1275         }
1276
1277         if (verbose > 3)
1278                 output_flist(flist);
1279
1280         if (list_only) {
1281                 int i;
1282                 for (i = 0; i < flist->count; i++)
1283                         list_file_entry(flist->files[i]);
1284         }
1285
1286         if (verbose > 2)
1287                 rprintf(FINFO, "recv_file_list done\n");
1288
1289         stats.flist_size = stats.total_read - start_read;
1290         stats.num_files = flist->count;
1291
1292         return flist;
1293
1294 oom:
1295         out_of_memory("recv_file_list");
1296         return NULL;            /* not reached */
1297 }
1298
1299
1300 int file_compare(struct file_struct **file1, struct file_struct **file2)
1301 {
1302         struct file_struct *f1 = *file1;
1303         struct file_struct *f2 = *file2;
1304
1305         if (!f1->basename && !f2->basename)
1306                 return 0;
1307         if (!f1->basename)
1308                 return -1;
1309         if (!f2->basename)
1310                 return 1;
1311         if (f1->dirname == f2->dirname)
1312                 return u_strcmp(f1->basename, f2->basename);
1313         return f_name_cmp(f1, f2);
1314 }
1315
1316
1317 int flist_find(struct file_list *flist, struct file_struct *f)
1318 {
1319         int low = 0, high = flist->count - 1;
1320
1321         while (high >= 0 && !flist->files[high]->basename) high--;
1322
1323         if (high < 0)
1324                 return -1;
1325
1326         while (low != high) {
1327                 int mid = (low + high) / 2;
1328                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1329                 if (ret == 0)
1330                         return flist_up(flist, mid);
1331                 if (ret > 0)
1332                         high = mid;
1333                 else
1334                         low = mid + 1;
1335         }
1336
1337         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1338                 return flist_up(flist, low);
1339         return -1;
1340 }
1341
1342 /*
1343  * Free up any resources a file_struct has allocated
1344  * and clear the file.
1345  */
1346 void clear_file(int i, struct file_list *flist)
1347 {
1348         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1349                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1350         memset(flist->files[i], 0, file_struct_len);
1351 }
1352
1353
1354 /*
1355  * allocate a new file list
1356  */
1357 struct file_list *flist_new(int with_hlink, char *msg)
1358 {
1359         struct file_list *flist;
1360
1361         flist = new(struct file_list);
1362         if (!flist)
1363                 out_of_memory(msg);
1364
1365         memset(flist, 0, sizeof (struct file_list));
1366
1367         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1368             out_of_memory, POOL_INTERN)))
1369                 out_of_memory(msg);
1370
1371 #if SUPPORT_HARD_LINKS
1372         if (with_hlink && preserve_hard_links) {
1373                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1374                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1375                         out_of_memory(msg);
1376         }
1377 #endif
1378
1379         return flist;
1380 }
1381
1382 /*
1383  * free up all elements in a flist
1384  */
1385 void flist_free(struct file_list *flist)
1386 {
1387         pool_destroy(flist->file_pool);
1388         pool_destroy(flist->hlink_pool);
1389         free(flist->files);
1390         free(flist);
1391 }
1392
1393
1394 /*
1395  * This routine ensures we don't have any duplicate names in our file list.
1396  * duplicate names can cause corruption because of the pipelining
1397  */
1398 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1399 {
1400         int i, prev_i = 0;
1401
1402         if (!flist || flist->count == 0)
1403                 return;
1404
1405         qsort(flist->files, flist->count,
1406             sizeof flist->files[0], (int (*)()) file_compare);
1407
1408         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1409                 if (flist->files[i]->basename) {
1410                         prev_i = i;
1411                         break;
1412                 }
1413         }
1414         while (++i < flist->count) {
1415                 if (!flist->files[i]->basename)
1416                         continue;
1417                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1418                         if (verbose > 1 && !am_server) {
1419                                 rprintf(FINFO,
1420                                         "removing duplicate name %s from file list %d\n",
1421                                         f_name(flist->files[i]), i);
1422                         }
1423                         /* Make sure that if we unduplicate '.', that we don't
1424                          * lose track of a user-specified starting point (or
1425                          * else deletions will mysteriously fail with -R). */
1426                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1427                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1428
1429                         clear_file(i, flist);
1430                 } else
1431                         prev_i = i;
1432         }
1433
1434         if (strip_root) {
1435                 /* we need to strip off the root directory in the case
1436                    of relative paths, but this must be done _after_
1437                    the sorting phase */
1438                 for (i = 0; i < flist->count; i++) {
1439                         if (flist->files[i]->dirname &&
1440                             flist->files[i]->dirname[0] == '/') {
1441                                 memmove(&flist->files[i]->dirname[0],
1442                                         &flist->files[i]->dirname[1],
1443                                         strlen(flist->files[i]->dirname));
1444                         }
1445
1446                         if (flist->files[i]->dirname &&
1447                             !flist->files[i]->dirname[0]) {
1448                                 flist->files[i]->dirname = NULL;
1449                         }
1450                 }
1451         }
1452 }
1453
1454 static void output_flist(struct file_list *flist)
1455 {
1456         char uidbuf[16], gidbuf[16];
1457         struct file_struct *file;
1458         int i;
1459
1460         for (i = 0; i < flist->count; i++) {
1461                 file = flist->files[i];
1462                 if (am_root && preserve_uid)
1463                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1464                 else
1465                         *uidbuf = '\0';
1466                 if (preserve_gid && file->gid != GID_NONE)
1467                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1468                 else
1469                         *gidbuf = '\0';
1470                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1471                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1472                         NS(file->basename), (int) file->mode,
1473                         (double) file->length, uidbuf, gidbuf);
1474         }
1475 }
1476
1477
1478 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1479
1480 /* Compare the names of two file_struct entities, just like strcmp()
1481  * would do if it were operating on the joined strings.  We assume
1482  * that there are no 0-length strings.
1483  */
1484 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1485 {
1486         int dif;
1487         const uchar *c1, *c2;
1488         enum fnc_state state1, state2;
1489
1490         if (!f1 || !f1->basename) {
1491                 if (!f2 || !f2->basename)
1492                         return 0;
1493                 return -1;
1494         }
1495         if (!f2 || !f2->basename)
1496                 return 1;
1497
1498         if (!(c1 = (uchar*)f1->dirname)) {
1499                 state1 = fnc_BASE;
1500                 c1 = (uchar*)f1->basename;
1501         } else
1502                 state1 = fnc_DIR;
1503         if (!(c2 = (uchar*)f2->dirname)) {
1504                 state2 = fnc_BASE;
1505                 c2 = (uchar*)f2->basename;
1506         } else
1507                 state2 = fnc_DIR;
1508
1509         while (1) {
1510                 if ((dif = (int)*c1 - (int)*c2) != 0)
1511                         break;
1512                 if (!*++c1) {
1513                         switch (state1) {
1514                         case fnc_DIR:
1515                                 state1 = fnc_SLASH;
1516                                 c1 = (uchar*)"/";
1517                                 break;
1518                         case fnc_SLASH:
1519                                 state1 = fnc_BASE;
1520                                 c1 = (uchar*)f1->basename;
1521                                 break;
1522                         case fnc_BASE:
1523                                 break;
1524                         }
1525                 }
1526                 if (!*++c2) {
1527                         switch (state2) {
1528                         case fnc_DIR:
1529                                 state2 = fnc_SLASH;
1530                                 c2 = (uchar*)"/";
1531                                 break;
1532                         case fnc_SLASH:
1533                                 state2 = fnc_BASE;
1534                                 c2 = (uchar*)f2->basename;
1535                                 break;
1536                         case fnc_BASE:
1537                                 if (!*c1)
1538                                         return 0;
1539                                 break;
1540                         }
1541                 }
1542         }
1543
1544         return dif;
1545 }
1546
1547
1548 /* Return a copy of the full filename of a flist entry, using the indicated
1549  * buffer.  No size-checking is done because we checked the size when creating
1550  * the file_struct entry.
1551  */
1552 char *f_name_to(struct file_struct *f, char *fbuf)
1553 {
1554         if (!f || !f->basename)
1555                 return NULL;
1556
1557         if (f->dirname) {
1558                 int len = strlen(f->dirname);
1559                 memcpy(fbuf, f->dirname, len);
1560                 fbuf[len] = '/';
1561                 strcpy(fbuf + len + 1, f->basename);
1562         } else
1563                 strcpy(fbuf, f->basename);
1564         return fbuf;
1565 }
1566
1567
1568 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1569  */
1570 char *f_name(struct file_struct *f)
1571 {
1572         static char names[5][MAXPATHLEN];
1573         static unsigned int n;
1574
1575         n = (n + 1) % (sizeof names / sizeof names[0]);
1576
1577         return f_name_to(f, names[n]);
1578 }