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
 735         if (strlcpy(thisname, fname, sizeof thisname)
 736             >= sizeof thisname - flist_dir_len) {
 737                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 738                 return NULL;
 739         }
 740         clean_fname(thisname);
 741         if (sanitize_paths)
 742                 sanitize_path(thisname, NULL);
 743
 744         memset(sum, 0, SUM_LENGTH);
 745
 746         if (readlink_stat(thisname, &st, linkname) != 0) {
 747                 int save_errno = errno;
 748                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 749                         /* either symlink pointing nowhere or file that
 750                          * was removed during rsync run; see if excluded
 751                          * before reporting an error */
 752                         if (check_exclude_file(thisname, 0, exclude_level)) {
 753                                 /* file is excluded anyway, ignore silently */
 754                                 return NULL;
 755                         }
 756                 }
 757                 io_error |= IOERR_GENERAL;
 758                 rprintf(FERROR, "readlink %s failed: %s\n",
 759                         full_fname(thisname), strerror(save_errno));
 760                 return NULL;
 761         }
 762
 763         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 764         if (exclude_level == NO_EXCLUDES)
 765                 goto skip_excludes;
 766
 767         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 768                 rprintf(FINFO, "skipping directory %s\n", thisname);
 769                 return NULL;
 770         }
 771
 772         /* We only care about directories because we need to avoid recursing
 773          * into a mount-point directory, not to avoid copying a symlinked
 774          * file if -L (or similar) was specified. */
 775         if (one_file_system && st.st_dev != filesystem_dev
 776             && S_ISDIR(st.st_mode))
 777                 flags |= FLAG_MOUNT_POINT;
 778
 779         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 780                 return NULL;
 781
 782         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 783                 return NULL;
 784
 785 skip_excludes:
 786
 787         if (verbose > 2) {
 788                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 789                         who_am_i(), thisname, exclude_level);
 790         }
 791
 792         if ((basename = strrchr(thisname, '/')) != NULL) {
 793                 dirname_len = ++basename - thisname; /* counts future '\0' */
 794                 if (lastdir_len == dirname_len - 1
 795                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 796                         dirname = lastdir;
 797                         dirname_len = 0; /* indicates no copy is needed */
 798                 } else
 799                         dirname = thisname;
 800         } else {
 801                 basename = thisname;
 802                 dirname = NULL;
 803                 dirname_len = 0;
 804         }
 805         basename_len = strlen(basename) + 1; /* count the '\0' */
 806
 807 #if SUPPORT_LINKS
 808         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 809 #else
 810         linkname_len = 0;
 811 #endif
 812
 813         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 814
 815         alloc_len = file_struct_len + dirname_len + basename_len
 816             + linkname_len + sum_len;
 817         if (flist) {
 818                 bp = pool_alloc(flist->file_pool, alloc_len,
 819                     "receive_file_entry");
 820         } else {
 821                 if (!(bp = new_array(char, alloc_len)))
 822                         out_of_memory("receive_file_entry");
 823         }
 824
 825         file = (struct file_struct *)bp;
 826         memset(bp, 0, file_struct_len);
 827         bp += file_struct_len;
 828
 829         file->flags = flags;
 830         file->modtime = st.st_mtime;
 831         file->length = st.st_size;
 832         file->mode = st.st_mode;
 833         file->uid = st.st_uid;
 834         file->gid = st.st_gid;
 835
 836 #if SUPPORT_HARD_LINKS
 837         if (flist && flist->hlink_pool) {
 838                 if (protocol_version < 28) {
 839                         if (S_ISREG(st.st_mode))
 840                                 file->link_u.idev = pool_talloc(
 841                                     flist->hlink_pool, struct idev, 1,
 842                                     "inode_table");
 843                 } else {
 844                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 845                                 file->link_u.idev = pool_talloc(
 846                                     flist->hlink_pool, struct idev, 1,
 847                                     "inode_table");
 848                 }
 849         }
 850         if (file->link_u.idev) {
 851                 file->F_DEV = st.st_dev;
 852                 file->F_INODE = st.st_ino;
 853         }
 854 #endif
 855
 856         if (dirname_len) {
 857                 file->dirname = lastdir = bp;
 858                 lastdir_len = dirname_len - 1;
 859                 memcpy(bp, dirname, dirname_len - 1);
 860                 bp += dirname_len;
 861                 bp[-1] = '\0';
 862         } else if (dirname)
 863                 file->dirname = dirname;
 864
 865         file->basename = bp;
 866         memcpy(bp, basename, basename_len);
 867         bp += basename_len;
 868
 869 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 870         if (preserve_devices && IS_DEVICE(st.st_mode))
 871                 file->u.rdev = st.st_rdev;
 872 #endif
 873
 874 #if SUPPORT_LINKS
 875         if (linkname_len) {
 876                 file->u.link = bp;
 877                 memcpy(bp, linkname, linkname_len);
 878                 bp += linkname_len;
 879         }
 880 #endif
 881
 882         if (sum_len) {
 883                 file->u.sum = bp;
 884                 file_checksum(thisname, bp, st.st_size);
 885                 /*bp += sum_len;*/
 886         }
 887
 888         file->basedir = flist_dir;
 889
 890         if (!S_ISDIR(st.st_mode))
 891                 stats.total_size += st.st_size;
 892
 893         return file;
 894 }
 895
 896
 897 void send_file_name(int f, struct file_list *flist, char *fname,
 898                     int recursive, unsigned short base_flags)
 899 {
 900         struct file_struct *file;
 901         char fbuf[MAXPATHLEN];
 902         extern int delete_excluded;
 903
 904         /* f is set to -1 when calculating deletion file list */
 905         file = make_file(fname, flist,
 906             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 907
 908         if (!file)
 909                 return;
 910
 911         maybe_emit_filelist_progress(flist);
 912
 913         flist_expand(flist);
 914
 915         if (write_batch)
 916                 file->flags |= FLAG_TOP_DIR;
 917
 918         if (file->basename[0]) {
 919                 flist->files[flist->count++] = file;
 920                 send_file_entry(file, f, base_flags);
 921         }
 922
 923         if (recursive && S_ISDIR(file->mode)
 924             && !(file->flags & FLAG_MOUNT_POINT)) {
 925                 struct exclude_struct **last_exclude_list = local_exclude_list;
 926                 send_directory(f, flist, f_name_to(file, fbuf));
 927                 local_exclude_list = last_exclude_list;
 928                 return;
 929         }
 930 }
 931
 932
 933 static void send_directory(int f, struct file_list *flist, char *dir)
 934 {
 935         DIR *d;
 936         struct dirent *di;
 937         char fname[MAXPATHLEN];
 938         unsigned int offset;
 939         char *p;
 940
 941         d = opendir(dir);
 942         if (!d) {
 943                 io_error |= IOERR_GENERAL;
 944                 rprintf(FERROR, "opendir %s failed: %s\n",
 945                         full_fname(dir), strerror(errno));
 946                 return;
 947         }
 948
 949         offset = strlcpy(fname, dir, MAXPATHLEN);
 950         p = fname + offset;
 951         if (offset >= MAXPATHLEN || p[-1] != '/') {
 952                 if (offset >= MAXPATHLEN - 1) {
 953                         io_error |= IOERR_GENERAL;
 954                         rprintf(FERROR, "skipping long-named directory: %s\n",
 955                                 full_fname(fname));
 956                         closedir(d);
 957                         return;
 958                 }
 959                 *p++ = '/';
 960                 offset++;
 961         }
 962
 963         local_exclude_list = NULL;
 964
 965         if (cvs_exclude) {
 966                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 967                     < MAXPATHLEN - offset)
 968                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 969                 else {
 970                         io_error |= IOERR_GENERAL;
 971                         rprintf(FINFO,
 972                                 "cannot cvs-exclude in long-named directory %s\n",
 973                                 full_fname(fname));
 974                 }
 975         }
 976
 977         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 978                 char *dname = d_name(di);
 979                 if (dname[0] == '.' && (dname[1] == '\0'
 980                     || (dname[1] == '.' && dname[2] == '\0')))
 981                         continue;
 982                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 983                         send_file_name(f, flist, fname, recurse, 0);
 984                 else {
 985                         io_error |= IOERR_GENERAL;
 986                         rprintf(FINFO,
 987                                 "cannot send long-named file %s\n",
 988                                 full_fname(fname));
 989                 }
 990         }
 991         if (errno) {
 992                 io_error |= IOERR_GENERAL;
 993                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 994                         dir, errno, strerror(errno));
 995         }
 996
 997         if (local_exclude_list)
 998                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
 999
1000         closedir(d);
1001 }
1002
1003
1004 /**
1005  * The delete_files() function in receiver.c sets f to -1 so that we just
1006  * construct the file list in memory without sending it over the wire.  It
1007  * also has the side-effect of ignoring user-excludes if delete_excluded
1008  * is set (so that the delete list includes user-excluded files).
1009  **/
1010 struct file_list *send_file_list(int f, int argc, char *argv[])
1011 {
1012         int l;
1013         STRUCT_STAT st;
1014         char *p, *dir, olddir[sizeof curr_dir];
1015         char lastpath[MAXPATHLEN] = "";
1016         struct file_list *flist;
1017         int64 start_write;
1018         int use_ff_fd = 0;
1019
1020         if (show_filelist_p() && f != -1)
1021                 start_filelist_progress("building file list");
1022
1023         start_write = stats.total_written;
1024
1025         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1026             "send_file_list");
1027
1028         if (f != -1) {
1029                 io_start_buffering_out(f);
1030                 if (filesfrom_fd >= 0) {
1031                         if (argv[0] && !push_dir(argv[0])) {
1032                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1033                                         full_fname(argv[0]), strerror(errno));
1034                                 exit_cleanup(RERR_FILESELECT);
1035                         }
1036                         use_ff_fd = 1;
1037                 }
1038         }
1039
1040         while (1) {
1041                 char fname2[MAXPATHLEN];
1042                 char *fname = fname2;
1043
1044                 if (use_ff_fd) {
1045                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1046                                 break;
1047                         sanitize_path(fname, NULL);
1048                 } else {
1049                         if (argc-- == 0)
1050                                 break;
1051                         strlcpy(fname, *argv++, MAXPATHLEN);
1052                         if (sanitize_paths)
1053                                 sanitize_path(fname, NULL);
1054                 }
1055
1056                 l = strlen(fname);
1057                 if (fname[l - 1] == '/') {
1058                         if (l == 2 && fname[0] == '.') {
1059                                 /* Turn "./" into just "." rather than "./." */
1060                                 fname[1] = '\0';
1061                         } else if (l < MAXPATHLEN) {
1062                                 fname[l++] = '.';
1063                                 fname[l] = '\0';
1064                         }
1065                 }
1066
1067                 if (link_stat(fname, &st) != 0) {
1068                         if (f != -1) {
1069                                 io_error |= IOERR_GENERAL;
1070                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1071                                         full_fname(fname), strerror(errno));
1072                         }
1073                         continue;
1074                 }
1075
1076                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1077                         rprintf(FINFO, "skipping directory %s\n", fname);
1078                         continue;
1079                 }
1080
1081                 dir = NULL;
1082                 olddir[0] = '\0';
1083
1084                 if (!relative_paths) {
1085                         p = strrchr(fname, '/');
1086                         if (p) {
1087                                 *p = 0;
1088                                 if (p == fname)
1089                                         dir = "/";
1090                                 else
1091                                         dir = fname;
1092                                 fname = p + 1;
1093                         }
1094                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1095                         /* this ensures we send the intermediate directories,
1096                            thus getting their permissions right */
1097                         char *lp = lastpath, *fn = fname, *slash = fname;
1098                         *p = 0;
1099                         /* Skip any initial directories in our path that we
1100                          * have in common with lastpath. */
1101                         while (*fn && *lp == *fn) {
1102                                 if (*fn == '/')
1103                                         slash = fn;
1104                                 lp++, fn++;
1105                         }
1106                         *p = '/';
1107                         if (fn != p || (*lp && *lp != '/')) {
1108                                 int copy_links_saved = copy_links;
1109                                 int recurse_saved = recurse;
1110                                 copy_links = copy_unsafe_links;
1111                                 /* set recurse to 1 to prevent make_file
1112                                  * from ignoring directory, but still
1113                                  * turn off the recursive parameter to
1114                                  * send_file_name */
1115                                 recurse = 1;
1116                                 while ((slash = strchr(slash+1, '/')) != 0) {
1117                                         *slash = 0;
1118                                         send_file_name(f, flist, fname, 0, 0);
1119                                         *slash = '/';
1120                                 }
1121                                 copy_links = copy_links_saved;
1122                                 recurse = recurse_saved;
1123                                 *p = 0;
1124                                 strlcpy(lastpath, fname, sizeof lastpath);
1125                                 *p = '/';
1126                         }
1127                 }
1128
1129                 if (!*fname)
1130                         fname = ".";
1131
1132                 if (dir && *dir) {
1133                         static char *lastdir;
1134                         static int lastdir_len;
1135
1136                         strcpy(olddir, curr_dir); /* can't overflow */
1137
1138                         if (!push_dir(dir)) {
1139                                 io_error |= IOERR_GENERAL;
1140                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1141                                         full_fname(dir), strerror(errno));
1142                                 continue;
1143                         }
1144
1145                         if (lastdir && strcmp(lastdir, dir) == 0) {
1146                                 flist_dir = lastdir;
1147                                 flist_dir_len = lastdir_len;
1148                         } else {
1149                                 flist_dir = lastdir = strdup(dir);
1150                                 flist_dir_len = lastdir_len = strlen(dir);
1151                         }
1152                 }
1153
1154                 if (one_file_system)
1155                         set_filesystem(fname);
1156
1157                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1158
1159                 if (olddir[0]) {
1160                         flist_dir = NULL;
1161                         flist_dir_len = 0;
1162                         if (!pop_dir(olddir)) {
1163                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1164                                         full_fname(dir), strerror(errno));
1165                                 exit_cleanup(RERR_FILESELECT);
1166                         }
1167                 }
1168         }
1169
1170         if (f != -1) {
1171                 send_file_entry(NULL, f, 0);
1172
1173                 if (show_filelist_p())
1174                         finish_filelist_progress(flist);
1175         }
1176
1177         if (flist->hlink_pool) {
1178                 pool_destroy(flist->hlink_pool);
1179                 flist->hlink_pool = NULL;
1180         }
1181
1182         clean_flist(flist, 0, 0);
1183
1184         if (f != -1) {
1185                 /* Now send the uid/gid list. This was introduced in
1186                  * protocol version 15 */
1187                 send_uid_list(f);
1188
1189                 /* send the io_error flag */
1190                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1191
1192                 io_end_buffering();
1193                 stats.flist_size = stats.total_written - start_write;
1194                 stats.num_files = flist->count;
1195                 if (write_batch)
1196                         write_batch_flist_info(flist->count, flist->files);
1197         }
1198
1199         if (verbose > 3)
1200                 output_flist(flist);
1201
1202         if (verbose > 2)
1203                 rprintf(FINFO, "send_file_list done\n");
1204
1205         return flist;
1206 }
1207
1208
1209 struct file_list *recv_file_list(int f)
1210 {
1211         struct file_list *flist;
1212         unsigned short flags;
1213         int64 start_read;
1214         extern int list_only;
1215
1216         if (show_filelist_p())
1217                 start_filelist_progress("receiving file list");
1218
1219         start_read = stats.total_read;
1220
1221         flist = flist_new(WITH_HLINK, "recv_file_list");
1222
1223         flist->count = 0;
1224         flist->malloced = 1000;
1225         flist->files = new_array(struct file_struct *, flist->malloced);
1226         if (!flist->files)
1227                 goto oom;
1228
1229
1230         while ((flags = read_byte(f)) != 0) {
1231                 int i = flist->count;
1232
1233                 flist_expand(flist);
1234
1235                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1236                         flags |= read_byte(f) << 8;
1237                 receive_file_entry(&flist->files[i], flags, flist, f);
1238
1239                 if (S_ISREG(flist->files[i]->mode))
1240                         stats.total_size += flist->files[i]->length;
1241
1242                 flist->count++;
1243
1244                 maybe_emit_filelist_progress(flist);
1245
1246                 if (verbose > 2) {
1247                         rprintf(FINFO, "recv_file_name(%s)\n",
1248                                 f_name(flist->files[i]));
1249                 }
1250         }
1251         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1252
1253         if (verbose > 2)
1254                 rprintf(FINFO, "received %d names\n", flist->count);
1255
1256         if (show_filelist_p())
1257                 finish_filelist_progress(flist);
1258
1259         clean_flist(flist, relative_paths, 1);
1260
1261         if (f != -1) {
1262                 /* Now send the uid/gid list. This was introduced in
1263                  * protocol version 15 */
1264                 recv_uid_list(f, flist);
1265
1266                 if (!read_batch) {
1267                         /* Recv the io_error flag */
1268                         if (lp_ignore_errors(module_id) || ignore_errors)
1269                                 read_int(f);
1270                         else
1271                                 io_error |= read_int(f);
1272                 }
1273         }
1274
1275         if (verbose > 3)
1276                 output_flist(flist);
1277
1278         if (list_only) {
1279                 int i;
1280                 for (i = 0; i < flist->count; i++)
1281                         list_file_entry(flist->files[i]);
1282         }
1283
1284         if (verbose > 2)
1285                 rprintf(FINFO, "recv_file_list done\n");
1286
1287         stats.flist_size = stats.total_read - start_read;
1288         stats.num_files = flist->count;
1289
1290         return flist;
1291
1292 oom:
1293         out_of_memory("recv_file_list");
1294         return NULL;            /* not reached */
1295 }
1296
1297
1298 int file_compare(struct file_struct **file1, struct file_struct **file2)
1299 {
1300         struct file_struct *f1 = *file1;
1301         struct file_struct *f2 = *file2;
1302
1303         if (!f1->basename && !f2->basename)
1304                 return 0;
1305         if (!f1->basename)
1306                 return -1;
1307         if (!f2->basename)
1308                 return 1;
1309         if (f1->dirname == f2->dirname)
1310                 return u_strcmp(f1->basename, f2->basename);
1311         return f_name_cmp(f1, f2);
1312 }
1313
1314
1315 int flist_find(struct file_list *flist, struct file_struct *f)
1316 {
1317         int low = 0, high = flist->count - 1;
1318
1319         while (high >= 0 && !flist->files[high]->basename) high--;
1320
1321         if (high < 0)
1322                 return -1;
1323
1324         while (low != high) {
1325                 int mid = (low + high) / 2;
1326                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1327                 if (ret == 0)
1328                         return flist_up(flist, mid);
1329                 if (ret > 0)
1330                         high = mid;
1331                 else
1332                         low = mid + 1;
1333         }
1334
1335         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1336                 return flist_up(flist, low);
1337         return -1;
1338 }
1339
1340 /*
1341  * Free up any resources a file_struct has allocated
1342  * and clear the file.
1343  */
1344 void clear_file(int i, struct file_list *flist)
1345 {
1346         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1347                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1348         memset(flist->files[i], 0, file_struct_len);
1349 }
1350
1351
1352 /*
1353  * allocate a new file list
1354  */
1355 struct file_list *flist_new(int with_hlink, char *msg)
1356 {
1357         struct file_list *flist;
1358
1359         flist = new(struct file_list);
1360         if (!flist)
1361                 out_of_memory(msg);
1362
1363         memset(flist, 0, sizeof (struct file_list));
1364
1365         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1366             out_of_memory, POOL_INTERN)))
1367                 out_of_memory(msg);
1368
1369 #if SUPPORT_HARD_LINKS
1370         if (with_hlink && preserve_hard_links) {
1371                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1372                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1373                         out_of_memory(msg);
1374         }
1375 #endif
1376
1377         return flist;
1378 }
1379
1380 /*
1381  * free up all elements in a flist
1382  */
1383 void flist_free(struct file_list *flist)
1384 {
1385         pool_destroy(flist->file_pool);
1386         pool_destroy(flist->hlink_pool);
1387         free(flist->files);
1388         free(flist);
1389 }
1390
1391
1392 /*
1393  * This routine ensures we don't have any duplicate names in our file list.
1394  * duplicate names can cause corruption because of the pipelining
1395  */
1396 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1397 {
1398         int i, prev_i = 0;
1399
1400         if (!flist || flist->count == 0)
1401                 return;
1402
1403         qsort(flist->files, flist->count,
1404             sizeof flist->files[0], (int (*)()) file_compare);
1405
1406         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1407                 if (flist->files[i]->basename) {
1408                         prev_i = i;
1409                         break;
1410                 }
1411         }
1412         while (++i < flist->count) {
1413                 if (!flist->files[i]->basename)
1414                         continue;
1415                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1416                         if (verbose > 1 && !am_server) {
1417                                 rprintf(FINFO,
1418                                         "removing duplicate name %s from file list %d\n",
1419                                         f_name(flist->files[i]), i);
1420                         }
1421                         /* Make sure that if we unduplicate '.', that we don't
1422                          * lose track of a user-specified starting point (or
1423                          * else deletions will mysteriously fail with -R). */
1424                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1425                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1426
1427                         clear_file(i, flist);
1428                 } else
1429                         prev_i = i;
1430         }
1431
1432         if (strip_root) {
1433                 /* we need to strip off the root directory in the case
1434                    of relative paths, but this must be done _after_
1435                    the sorting phase */
1436                 for (i = 0; i < flist->count; i++) {
1437                         if (flist->files[i]->dirname &&
1438                             flist->files[i]->dirname[0] == '/') {
1439                                 memmove(&flist->files[i]->dirname[0],
1440                                         &flist->files[i]->dirname[1],
1441                                         strlen(flist->files[i]->dirname));
1442                         }
1443
1444                         if (flist->files[i]->dirname &&
1445                             !flist->files[i]->dirname[0]) {
1446                                 flist->files[i]->dirname = NULL;
1447                         }
1448                 }
1449         }
1450 }
1451
1452 static void output_flist(struct file_list *flist)
1453 {
1454         char uidbuf[16], gidbuf[16];
1455         struct file_struct *file;
1456         int i;
1457
1458         for (i = 0; i < flist->count; i++) {
1459                 file = flist->files[i];
1460                 if (am_root && preserve_uid)
1461                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1462                 else
1463                         *uidbuf = '\0';
1464                 if (preserve_gid && file->gid != GID_NONE)
1465                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1466                 else
1467                         *gidbuf = '\0';
1468                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1469                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1470                         NS(file->basename), (int) file->mode,
1471                         (double) file->length, uidbuf, gidbuf);
1472         }
1473 }
1474
1475
1476 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1477
1478 /* Compare the names of two file_struct entities, just like strcmp()
1479  * would do if it were operating on the joined strings.  We assume
1480  * that there are no 0-length strings.
1481  */
1482 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1483 {
1484         int dif;
1485         const uchar *c1, *c2;
1486         enum fnc_state state1, state2;
1487
1488         if (!f1 || !f1->basename) {
1489                 if (!f2 || !f2->basename)
1490                         return 0;
1491                 return -1;
1492         }
1493         if (!f2 || !f2->basename)
1494                 return 1;
1495
1496         if (!(c1 = (uchar*)f1->dirname)) {
1497                 state1 = fnc_BASE;
1498                 c1 = (uchar*)f1->basename;
1499         } else
1500                 state1 = fnc_DIR;
1501         if (!(c2 = (uchar*)f2->dirname)) {
1502                 state2 = fnc_BASE;
1503                 c2 = (uchar*)f2->basename;
1504         } else
1505                 state2 = fnc_DIR;
1506
1507         while (1) {
1508                 if ((dif = (int)*c1 - (int)*c2) != 0)
1509                         break;
1510                 if (!*++c1) {
1511                         switch (state1) {
1512                         case fnc_DIR:
1513                                 state1 = fnc_SLASH;
1514                                 c1 = (uchar*)"/";
1515                                 break;
1516                         case fnc_SLASH:
1517                                 state1 = fnc_BASE;
1518                                 c1 = (uchar*)f1->basename;
1519                                 break;
1520                         case fnc_BASE:
1521                                 break;
1522                         }
1523                 }
1524                 if (!*++c2) {
1525                         switch (state2) {
1526                         case fnc_DIR:
1527                                 state2 = fnc_SLASH;
1528                                 c2 = (uchar*)"/";
1529                                 break;
1530                         case fnc_SLASH:
1531                                 state2 = fnc_BASE;
1532                                 c2 = (uchar*)f2->basename;
1533                                 break;
1534                         case fnc_BASE:
1535                                 if (!*c1)
1536                                         return 0;
1537                                 break;
1538                         }
1539                 }
1540         }
1541
1542         return dif;
1543 }
1544
1545
1546 /* Return a copy of the full filename of a flist entry, using the indicated
1547  * buffer.  No size-checking is done because we checked the size when creating
1548  * the file_struct entry.
1549  */
1550 char *f_name_to(struct file_struct *f, char *fbuf)
1551 {
1552         if (!f || !f->basename)
1553                 return NULL;
1554
1555         if (f->dirname) {
1556                 int len = strlen(f->dirname);
1557                 memcpy(fbuf, f->dirname, len);
1558                 fbuf[len] = '/';
1559                 strcpy(fbuf + len + 1, f->basename);
1560         } else
1561                 strcpy(fbuf, f->basename);
1562         return fbuf;
1563 }
1564
1565
1566 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1567  */
1568 char *f_name(struct file_struct *f)
1569 {
1570         static char names[5][MAXPATHLEN];
1571         static unsigned int n;
1572
1573         n = (n + 1) % (sizeof names / sizeof names[0]);
1574
1575         return f_name_to(f, names[n]);
1576 }