flist.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4    Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 /** @file flist.c
  22  * Generate and receive file lists
  23  *
  24  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
  25  *
  26  **/
  27
  28 #include "rsync.h"
  29
  30 extern struct stats stats;
  31
  32 extern int verbose;
  33 extern int do_progress;
  34 extern int am_root;
  35 extern int am_server;
  36 extern int am_daemon;
  37 extern int always_checksum;
  38 extern int module_id;
  39 extern int ignore_errors;
  40 extern int numeric_ids;
  41
  42 extern int cvs_exclude;
  43
  44 extern int recurse;
  45 extern char curr_dir[MAXPATHLEN];
  46 extern char *files_from;
  47 extern int filesfrom_fd;
  48
  49 extern int one_file_system;
  50 extern int preserve_links;
  51 extern int preserve_hard_links;
  52 extern int preserve_perms;
  53 extern int preserve_devices;
  54 extern int preserve_uid;
  55 extern int preserve_gid;
  56 extern int preserve_times;
  57 extern int relative_paths;
  58 extern int implied_dirs;
  59 extern int copy_links;
  60 extern int copy_unsafe_links;
  61 extern int protocol_version;
  62 extern int sanitize_paths;
  63
  64 extern int read_batch;
  65 extern int write_batch;
  66
  67 extern struct exclude_struct **exclude_list;
  68 extern struct exclude_struct **server_exclude_list;
  69 extern struct exclude_struct **local_exclude_list;
  70
  71 int io_error;
  72
  73 static char empty_sum[MD4_SUM_LENGTH];
  74 static unsigned int file_struct_len;
  75
  76 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  77 static void output_flist(struct file_list *flist);
  78
  79 void init_flist(void)
  80 {
  81         struct file_struct f;
  82
  83         /* Figure out how big the file_struct is without trailing padding */
  84         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
  85 }
  86
  87
  88 static int show_filelist_p(void)
  89 {
  90         return verbose && (recurse || files_from) && !am_server;
  91 }
  92
  93 static void start_filelist_progress(char *kind)
  94 {
  95         rprintf(FINFO, "%s ... ", kind);
  96         if ((verbose > 1) || do_progress)
  97                 rprintf(FINFO, "\n");
  98         rflush(FINFO);
  99 }
 100
 101
 102 static void emit_filelist_progress(const struct file_list *flist)
 103 {
 104         rprintf(FINFO, " %d files...\r", flist->count);
 105 }
 106
 107
 108 static void maybe_emit_filelist_progress(const struct file_list *flist)
 109 {
 110         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 111                 emit_filelist_progress(flist);
 112 }
 113
 114
 115 static void finish_filelist_progress(const struct file_list *flist)
 116 {
 117         if (do_progress) {
 118                 /* This overwrites the progress line */
 119                 rprintf(FINFO, "%d file%sto consider\n",
 120                         flist->count, flist->count == 1 ? " " : "s ");
 121         } else
 122                 rprintf(FINFO, "done\n");
 123 }
 124
 125 void show_flist_stats(void)
 126 {
 127         /* Nothing yet */
 128 }
 129
 130
 131 static void list_file_entry(struct file_struct *f)
 132 {
 133         char perms[11];
 134
 135         if (!f->basename)
 136                 /* this can happen if duplicate names were removed */
 137                 return;
 138
 139         permstring(perms, f->mode);
 140
 141 #if SUPPORT_LINKS
 142         if (preserve_links && S_ISLNK(f->mode)) {
 143                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 144                         perms,
 145                         (double) f->length, timestring(f->modtime),
 146                         f_name(f), f->u.link);
 147         } else
 148 #endif
 149                 rprintf(FINFO, "%s %11.0f %s %s\n",
 150                         perms,
 151                         (double) f->length, timestring(f->modtime),
 152                         f_name(f));
 153 }
 154
 155
 156 /**
 157  * Stat either a symlink or its referent, depending on the settings of
 158  * copy_links, copy_unsafe_links, etc.
 159  *
 160  * @retval -1 on error
 161  *
 162  * @retval 0 for success
 163  *
 164  * @post If @p path is a symlink, then @p linkbuf (of size @c
 165  * MAXPATHLEN) contains the symlink target.
 166  *
 167  * @post @p buffer contains information about the link or the
 168  * referrent as appropriate, if they exist.
 169  **/
 170 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 171 {
 172 #if SUPPORT_LINKS
 173         if (copy_links)
 174                 return do_stat(path, buffer);
 175         if (do_lstat(path, buffer) == -1)
 176                 return -1;
 177         if (S_ISLNK(buffer->st_mode)) {
 178                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 179                 if (l == -1)
 180                         return -1;
 181                 linkbuf[l] = 0;
 182                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 183                         if (verbose > 1) {
 184                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 185                                         path, linkbuf);
 186                         }
 187                         return do_stat(path, buffer);
 188                 }
 189         }
 190         return 0;
 191 #else
 192         return do_stat(path, buffer);
 193 #endif
 194 }
 195
 196 int link_stat(const char *path, STRUCT_STAT * buffer)
 197 {
 198 #if SUPPORT_LINKS
 199         if (copy_links)
 200                 return do_stat(path, buffer);
 201         return do_lstat(path, buffer);
 202 #else
 203         return do_stat(path, buffer);
 204 #endif
 205 }
 206
 207 /*
 208  * This function is used to check if a file should be included/excluded
 209  * from the list of files based on its name and type etc.  The value of
 210  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 211  */
 212 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 213 {
 214 #if 0 /* This currently never happens, so avoid a useless compare. */
 215         if (exclude_level == NO_EXCLUDES)
 216                 return 0;
 217 #endif
 218         if (fname) {
 219                 /* never exclude '.', even if somebody does --exclude '*' */
 220                 if (fname[0] == '.' && !fname[1])
 221                         return 0;
 222                 /* Handle the -R version of the '.' dir. */
 223                 if (fname[0] == '/') {
 224                         int len = strlen(fname);
 225                         if (fname[len-1] == '.' && fname[len-2] == '/')
 226                                 return 0;
 227                 }
 228         }
 229         if (server_exclude_list
 230          && check_exclude(server_exclude_list, fname, is_dir))
 231                 return 1;
 232         if (exclude_level != ALL_EXCLUDES)
 233                 return 0;
 234         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 235                 return 1;
 236         if (local_exclude_list
 237          && check_exclude(local_exclude_list, fname, is_dir))
 238                 return 1;
 239         return 0;
 240 }
 241
 242 /* used by the one_file_system code */
 243 static dev_t filesystem_dev;
 244
 245 static void set_filesystem(char *fname)
 246 {
 247         STRUCT_STAT st;
 248         if (link_stat(fname, &st) != 0)
 249                 return;
 250         filesystem_dev = st.st_dev;
 251 }
 252
 253
 254 static int to_wire_mode(mode_t mode)
 255 {
 256 #if SUPPORT_LINKS
 257         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 258                 return (mode & ~(_S_IFMT)) | 0120000;
 259 #endif
 260         return (int) mode;
 261 }
 262
 263 static mode_t from_wire_mode(int mode)
 264 {
 265         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 266                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 267         return (mode_t) mode;
 268 }
 269
 270
 271 static void send_directory(int f, struct file_list *flist, char *dir);
 272
 273 static char *flist_dir;
 274 static int flist_dir_len;
 275
 276
 277 /**
 278  * Make sure @p flist is big enough to hold at least @p flist->count
 279  * entries.
 280  **/
 281 void flist_expand(struct file_list *flist)
 282 {
 283         void *new_ptr;
 284
 285         if (flist->count < flist->malloced)
 286                 return;
 287
 288         if (flist->malloced < FLIST_START)
 289                 flist->malloced = FLIST_START;
 290         else if (flist->malloced >= FLIST_LINEAR)
 291                 flist->malloced += FLIST_LINEAR;
 292         else
 293                 flist->malloced *= 2;
 294
 295         /*
 296          * In case count jumped or we are starting the list
 297          * with a known size just set it.
 298          */
 299         if (flist->malloced < flist->count)
 300                 flist->malloced = flist->count;
 301
 302         if (flist->files) {
 303                 new_ptr = realloc_array(flist->files,
 304                     struct file_struct *, flist->malloced);
 305         } else {
 306                 new_ptr = new_array(struct file_struct *, flist->malloced);
 307         }
 308
 309         if (verbose >= 2) {
 310                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 311                     who_am_i(),
 312                     (double) sizeof flist->files[0] * flist->malloced,
 313                     (new_ptr == flist->files) ? " not" : "");
 314         }
 315
 316         flist->files = (struct file_struct **) new_ptr;
 317
 318         if (!flist->files)
 319                 out_of_memory("flist_expand");
 320 }
 321
 322 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 323 {
 324         unsigned short flags;
 325         static time_t modtime;
 326         static mode_t mode;
 327         static DEV64_T rdev, rdev_high;
 328         static DEV64_T dev;
 329         static uid_t uid;
 330         static gid_t gid;
 331         static char lastname[MAXPATHLEN];
 332         char *fname, fbuf[MAXPATHLEN];
 333         int l1, l2;
 334
 335         if (f == -1)
 336                 return;
 337
 338         if (!file) {
 339                 write_byte(f, 0);
 340                 modtime = 0, mode = 0;
 341                 rdev = 0, rdev_high = 0, dev = 0;
 342                 uid = 0, gid = 0;
 343                 *lastname = '\0';
 344                 return;
 345         }
 346
 347         io_write_phase = "send_file_entry";
 348
 349         fname = f_name_to(file, fbuf);
 350
 351         flags = base_flags;
 352
 353         if (file->mode == mode)
 354                 flags |= XMIT_SAME_MODE;
 355         else
 356                 mode = file->mode;
 357         if (preserve_devices) {
 358                 if (protocol_version < 28) {
 359                         if (IS_DEVICE(mode)) {
 360                                 if (file->u.rdev == rdev) {
 361                                         /* Set both flags to simplify the test
 362                                          * when writing the data. */
 363                                         flags |= XMIT_SAME_RDEV_pre28
 364                                             | XMIT_SAME_HIGH_RDEV;
 365                                 } else
 366                                         rdev = file->u.rdev;
 367                         } else
 368                                 rdev = 0;
 369                 } else if (IS_DEVICE(mode)) {
 370                         if ((file->u.rdev & ~0xFF) == rdev_high)
 371                                 flags |= XMIT_SAME_HIGH_RDEV;
 372                         else {
 373                                 rdev = file->u.rdev;
 374                                 rdev_high = rdev & ~0xFF;
 375                         }
 376                 }
 377         }
 378         if (file->uid == uid)
 379                 flags |= XMIT_SAME_UID;
 380         else
 381                 uid = file->uid;
 382         if (file->gid == gid)
 383                 flags |= XMIT_SAME_GID;
 384         else
 385                 gid = file->gid;
 386         if (file->modtime == modtime)
 387                 flags |= XMIT_SAME_TIME;
 388         else
 389                 modtime = file->modtime;
 390
 391 #if SUPPORT_HARD_LINKS
 392         if (file->link_u.idev) {
 393                 if (file->F_DEV == dev) {
 394                         if (protocol_version >= 28)
 395                                 flags |= XMIT_SAME_DEV;
 396                 } else
 397                         dev = file->F_DEV;
 398                 flags |= XMIT_HAS_IDEV_DATA;
 399         }
 400 #endif
 401
 402         for (l1 = 0;
 403             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 404             l1++) {}
 405         l2 = strlen(fname+l1);
 406
 407         if (l1 > 0)
 408                 flags |= XMIT_SAME_NAME;
 409         if (l2 > 255)
 410                 flags |= XMIT_LONG_NAME;
 411
 412         /* We must make sure we don't send a zero flag byte or the
 413          * other end will terminate the flist transfer.  Note that
 414          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 415          * it's harmless way to add a bit to the first flag byte. */
 416         if (protocol_version >= 28) {
 417                 if (!flags && !S_ISDIR(mode))
 418                         flags |= XMIT_TOP_DIR;
 419                 if ((flags & 0xFF00) || !flags) {
 420                         flags |= XMIT_EXTENDED_FLAGS;
 421                         write_byte(f, flags);
 422                         write_byte(f, flags >> 8);
 423                 } else
 424                         write_byte(f, flags);
 425         } else {
 426                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 427                         flags |= XMIT_TOP_DIR;
 428                 if (!(flags & 0xFF))
 429                         flags |= XMIT_LONG_NAME;
 430                 write_byte(f, flags);
 431         }
 432         if (flags & XMIT_SAME_NAME)
 433                 write_byte(f, l1);
 434         if (flags & XMIT_LONG_NAME)
 435                 write_int(f, l2);
 436         else
 437                 write_byte(f, l2);
 438         write_buf(f, fname + l1, l2);
 439
 440         write_longint(f, file->length);
 441         if (!(flags & XMIT_SAME_TIME))
 442                 write_int(f, modtime);
 443         if (!(flags & XMIT_SAME_MODE))
 444                 write_int(f, to_wire_mode(mode));
 445         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 446                 if (!numeric_ids)
 447                         add_uid(uid);
 448                 write_int(f, uid);
 449         }
 450         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 451                 if (!numeric_ids)
 452                         add_gid(gid);
 453                 write_int(f, gid);
 454         }
 455         if (preserve_devices && IS_DEVICE(mode)) {
 456                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 457                  * also off. */
 458                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 459                         write_int(f, rdev);
 460                 else if (protocol_version >= 28)
 461                         write_byte(f, rdev);
 462         }
 463
 464 #if SUPPORT_LINKS
 465         if (preserve_links && S_ISLNK(mode)) {
 466                 int len = strlen(file->u.link);
 467                 write_int(f, len);
 468                 write_buf(f, file->u.link, len);
 469         }
 470 #endif
 471
 472 #if SUPPORT_HARD_LINKS
 473         if (flags & XMIT_HAS_IDEV_DATA) {
 474                 if (protocol_version < 26) {
 475                         /* 32-bit dev_t and ino_t */
 476                         write_int(f, dev);
 477                         write_int(f, file->F_INODE);
 478                 } else {
 479                         /* 64-bit dev_t and ino_t */
 480                         if (!(flags & XMIT_SAME_DEV))
 481                                 write_longint(f, dev);
 482                         write_longint(f, file->F_INODE);
 483                 }
 484         }
 485 #endif
 486
 487         if (always_checksum) {
 488                 char *sum;
 489                 if (S_ISREG(mode))
 490                         sum = file->u.sum;
 491                 else if (protocol_version < 28) {
 492                         /* Prior to 28, we sent a useless set of nulls. */
 493                         sum = empty_sum;
 494                 } else
 495                         sum = NULL;
 496                 if (sum) {
 497                         write_buf(f, sum,
 498                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 499                 }
 500         }
 501
 502         strlcpy(lastname, fname, MAXPATHLEN);
 503
 504         io_write_phase = "unknown";
 505 }
 506
 507
 508
 509 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 510     struct file_list *flist, int f)
 511 {
 512         static time_t modtime;
 513         static mode_t mode;
 514         static DEV64_T rdev, rdev_high;
 515         static DEV64_T dev;
 516         static uid_t uid;
 517         static gid_t gid;
 518         static char lastname[MAXPATHLEN], *lastdir;
 519         static int lastdir_len = -1;
 520         char thisname[MAXPATHLEN];
 521         unsigned int l1 = 0, l2 = 0;
 522         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 523         OFF_T file_length;
 524         char *basename, *dirname, *bp;
 525         struct file_struct *file;
 526
 527         if (!fptr) {
 528                 modtime = 0, mode = 0;
 529                 rdev = 0, rdev_high = 0, dev = 0;
 530                 uid = 0, gid = 0;
 531                 *lastname = '\0';
 532                 return;
 533         }
 534
 535         if (flags & XMIT_SAME_NAME)
 536                 l1 = read_byte(f);
 537
 538         if (flags & XMIT_LONG_NAME)
 539                 l2 = read_int(f);
 540         else
 541                 l2 = read_byte(f);
 542
 543         if (l2 >= MAXPATHLEN - l1) {
 544                 rprintf(FERROR,
 545                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 546                         flags, l1, l2, lastname);
 547                 overflow("receive_file_entry");
 548         }
 549
 550         strlcpy(thisname, lastname, l1 + 1);
 551         read_sbuf(f, &thisname[l1], l2);
 552         thisname[l1 + l2] = 0;
 553
 554         strlcpy(lastname, thisname, MAXPATHLEN);
 555
 556         clean_fname(thisname);
 557
 558         if (sanitize_paths)
 559                 sanitize_path(thisname, NULL);
 560
 561         if ((basename = strrchr(thisname, '/')) != NULL) {
 562                 dirname_len = ++basename - thisname; /* counts future '\0' */
 563                 if (lastdir_len == dirname_len - 1
 564                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 565                         dirname = lastdir;
 566                         dirname_len = 0; /* indicates no copy is needed */
 567                 } else
 568                         dirname = thisname;
 569         } else {
 570                 basename = thisname;
 571                 dirname = NULL;
 572                 dirname_len = 0;
 573         }
 574         basename_len = strlen(basename) + 1; /* count the '\0' */
 575
 576         file_length = read_longint(f);
 577         if (!(flags & XMIT_SAME_TIME))
 578                 modtime = (time_t)read_int(f);
 579         if (!(flags & XMIT_SAME_MODE))
 580                 mode = from_wire_mode(read_int(f));
 581
 582         if (preserve_uid && !(flags & XMIT_SAME_UID))
 583                 uid = (uid_t)read_int(f);
 584         if (preserve_gid && !(flags & XMIT_SAME_GID))
 585                 gid = (gid_t)read_int(f);
 586
 587         if (preserve_devices) {
 588                 if (protocol_version < 28) {
 589                         if (IS_DEVICE(mode)) {
 590                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 591                                         rdev = (DEV64_T)read_int(f);
 592                         } else
 593                                 rdev = 0;
 594                 } else if (IS_DEVICE(mode)) {
 595                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 596                                 rdev = (DEV64_T)read_int(f);
 597                                 rdev_high = rdev & ~0xFF;
 598                         } else
 599                                 rdev = rdev_high | (DEV64_T)read_byte(f);
 600                 }
 601         }
 602
 603 #if SUPPORT_LINKS
 604         if (preserve_links && S_ISLNK(mode)) {
 605                 linkname_len = read_int(f) + 1; /* count the '\0' */
 606                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 607                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 608                                 linkname_len - 1);
 609                         overflow("receive_file_entry");
 610                 }
 611         }
 612         else
 613 #endif
 614                 linkname_len = 0;
 615
 616         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 617
 618         alloc_len = file_struct_len + dirname_len + basename_len
 619                   + linkname_len + sum_len;
 620         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 621
 622         file = *fptr = (struct file_struct *)bp;
 623         memset(bp, 0, file_struct_len);
 624         bp += file_struct_len;
 625
 626         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 627         file->modtime = modtime;
 628         file->length = file_length;
 629         file->mode = mode;
 630         file->uid = uid;
 631         file->gid = gid;
 632
 633         if (dirname_len) {
 634                 file->dirname = lastdir = bp;
 635                 lastdir_len = dirname_len - 1;
 636                 memcpy(bp, dirname, dirname_len - 1);
 637                 bp += dirname_len;
 638                 bp[-1] = '\0';
 639         } else if (dirname)
 640                 file->dirname = dirname;
 641
 642         file->basename = bp;
 643         memcpy(bp, basename, basename_len);
 644         bp += basename_len;
 645
 646         if (preserve_devices && IS_DEVICE(mode))
 647                 file->u.rdev = rdev;
 648
 649 #if SUPPORT_LINKS
 650         if (linkname_len) {
 651                 file->u.link = bp;
 652                 read_sbuf(f, bp, linkname_len - 1);
 653                 if (sanitize_paths)
 654                         sanitize_path(bp, lastdir);
 655                 bp += linkname_len;
 656         }
 657 #endif
 658
 659 #if SUPPORT_HARD_LINKS
 660         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 661                 flags |= XMIT_HAS_IDEV_DATA;
 662         if (flags & XMIT_HAS_IDEV_DATA) {
 663                 INO64_T inode;
 664                 if (protocol_version < 26) {
 665                         dev = read_int(f);
 666                         inode = read_int(f);
 667                 } else {
 668                         if (!(flags & XMIT_SAME_DEV))
 669                                 dev = read_longint(f);
 670                         inode = read_longint(f);
 671                 }
 672                 if (flist->hlink_pool) {
 673                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 674                             struct idev, 1, "inode_table");
 675                         file->F_INODE = inode;
 676                         file->F_DEV = dev;
 677                 }
 678         }
 679 #endif
 680
 681         if (always_checksum) {
 682                 char *sum;
 683                 if (sum_len) {
 684                         file->u.sum = sum = bp;
 685                         /*bp += sum_len;*/
 686                 } else if (protocol_version < 28) {
 687                         /* Prior to 28, we get a useless set of nulls. */
 688                         sum = empty_sum;
 689                 } else
 690                         sum = NULL;
 691                 if (sum) {
 692                         read_buf(f, sum,
 693                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 694                 }
 695         }
 696
 697         if (!preserve_perms) {
 698                 extern int orig_umask;
 699                 /* set an appropriate set of permissions based on original
 700                  * permissions and umask. This emulates what GNU cp does */
 701                 file->mode &= ~orig_umask;
 702         }
 703 }
 704
 705
 706 /**
 707  * Create a file_struct for a named file by reading its stat()
 708  * information and performing extensive checks against global
 709  * options.
 710  *
 711  * @return the new file, or NULL if there was an error or this file
 712  * should be excluded.
 713  *
 714  * @todo There is a small optimization opportunity here to avoid
 715  * stat()ing the file in some circumstances, which has a certain cost.
 716  * We are called immediately after doing readdir(), and so we may
 717  * already know the d_type of the file.  We could for example avoid
 718  * statting directories if we're not recursing, but this is not a very
 719  * important case.  Some systems may not have d_type.
 720  **/
 721 struct file_struct *make_file(char *fname,
 722     struct file_list *flist, int exclude_level)
 723 {
 724         static char *lastdir;
 725         static int lastdir_len = -1;
 726         struct file_struct *file;
 727         STRUCT_STAT st;
 728         char sum[SUM_LENGTH];
 729         char thisname[MAXPATHLEN];
 730         char linkname[MAXPATHLEN];
 731         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 732         char *basename, *dirname, *bp;
 733         unsigned short flags = 0;
 734
 735         if (!flist)     /* lastdir isn't valid if flist is NULL */
 736                 lastdir_len = -1;
 737
 738         if (strlcpy(thisname, fname, sizeof thisname)
 739             >= sizeof thisname - flist_dir_len) {
 740                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 741                 return NULL;
 742         }
 743         clean_fname(thisname);
 744         if (sanitize_paths)
 745                 sanitize_path(thisname, NULL);
 746
 747         memset(sum, 0, SUM_LENGTH);
 748
 749         if (readlink_stat(thisname, &st, linkname) != 0) {
 750                 int save_errno = errno;
 751                 if (errno == ENOENT) {
 752                         enum logcode c = am_daemon && protocol_version < 28
 753                             ? FERROR : FINFO;
 754                         /* either symlink pointing nowhere or file that
 755                          * was removed during rsync run; see if excluded
 756                          * before reporting an error */
 757                         if (exclude_level != NO_EXCLUDES
 758                             && check_exclude_file(thisname, 0, exclude_level)) {
 759                                 /* file is excluded anyway, ignore silently */
 760                                 return NULL;
 761                         }
 762                         io_error |= IOERR_VANISHED;
 763                         rprintf(c, "file has vanished: %s\n",
 764                             full_fname(thisname));
 765                 }
 766                 else {
 767                         io_error |= IOERR_GENERAL;
 768                         rprintf(FERROR, "readlink %s failed: %s\n",
 769                             full_fname(thisname), strerror(save_errno));
 770                 }
 771                 return NULL;
 772         }
 773
 774         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 775         if (exclude_level == NO_EXCLUDES)
 776                 goto skip_excludes;
 777
 778         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 779                 rprintf(FINFO, "skipping directory %s\n", thisname);
 780                 return NULL;
 781         }
 782
 783         /* We only care about directories because we need to avoid recursing
 784          * into a mount-point directory, not to avoid copying a symlinked
 785          * file if -L (or similar) was specified. */
 786         if (one_file_system && st.st_dev != filesystem_dev
 787             && S_ISDIR(st.st_mode))
 788                 flags |= FLAG_MOUNT_POINT;
 789
 790         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 791                 return NULL;
 792
 793         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 794                 return NULL;
 795
 796 skip_excludes:
 797
 798         if (verbose > 2) {
 799                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 800                         who_am_i(), thisname, exclude_level);
 801         }
 802
 803         if ((basename = strrchr(thisname, '/')) != NULL) {
 804                 dirname_len = ++basename - thisname; /* counts future '\0' */
 805                 if (lastdir_len == dirname_len - 1
 806                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 807                         dirname = lastdir;
 808                         dirname_len = 0; /* indicates no copy is needed */
 809                 } else
 810                         dirname = thisname;
 811         } else {
 812                 basename = thisname;
 813                 dirname = NULL;
 814                 dirname_len = 0;
 815         }
 816         basename_len = strlen(basename) + 1; /* count the '\0' */
 817
 818 #if SUPPORT_LINKS
 819         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 820 #else
 821         linkname_len = 0;
 822 #endif
 823
 824         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 825
 826         alloc_len = file_struct_len + dirname_len + basename_len
 827             + linkname_len + sum_len;
 828         if (flist) {
 829                 bp = pool_alloc(flist->file_pool, alloc_len,
 830                     "receive_file_entry");
 831         } else {
 832                 if (!(bp = new_array(char, alloc_len)))
 833                         out_of_memory("receive_file_entry");
 834         }
 835
 836         file = (struct file_struct *)bp;
 837         memset(bp, 0, file_struct_len);
 838         bp += file_struct_len;
 839
 840         file->flags = flags;
 841         file->modtime = st.st_mtime;
 842         file->length = st.st_size;
 843         file->mode = st.st_mode;
 844         file->uid = st.st_uid;
 845         file->gid = st.st_gid;
 846
 847 #if SUPPORT_HARD_LINKS
 848         if (flist && flist->hlink_pool) {
 849                 if (protocol_version < 28) {
 850                         if (S_ISREG(st.st_mode))
 851                                 file->link_u.idev = pool_talloc(
 852                                     flist->hlink_pool, struct idev, 1,
 853                                     "inode_table");
 854                 } else {
 855                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 856                                 file->link_u.idev = pool_talloc(
 857                                     flist->hlink_pool, struct idev, 1,
 858                                     "inode_table");
 859                 }
 860         }
 861         if (file->link_u.idev) {
 862                 file->F_DEV = st.st_dev;
 863                 file->F_INODE = st.st_ino;
 864         }
 865 #endif
 866
 867         if (dirname_len) {
 868                 file->dirname = lastdir = bp;
 869                 lastdir_len = dirname_len - 1;
 870                 memcpy(bp, dirname, dirname_len - 1);
 871                 bp += dirname_len;
 872                 bp[-1] = '\0';
 873         } else if (dirname)
 874                 file->dirname = dirname;
 875
 876         file->basename = bp;
 877         memcpy(bp, basename, basename_len);
 878         bp += basename_len;
 879
 880 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 881         if (preserve_devices && IS_DEVICE(st.st_mode))
 882                 file->u.rdev = st.st_rdev;
 883 #endif
 884
 885 #if SUPPORT_LINKS
 886         if (linkname_len) {
 887                 file->u.link = bp;
 888                 memcpy(bp, linkname, linkname_len);
 889                 bp += linkname_len;
 890         }
 891 #endif
 892
 893         if (sum_len) {
 894                 file->u.sum = bp;
 895                 file_checksum(thisname, bp, st.st_size);
 896                 /*bp += sum_len;*/
 897         }
 898
 899         file->basedir = flist_dir;
 900
 901         if (!S_ISDIR(st.st_mode))
 902                 stats.total_size += st.st_size;
 903
 904         return file;
 905 }
 906
 907
 908 void send_file_name(int f, struct file_list *flist, char *fname,
 909                     int recursive, unsigned short base_flags)
 910 {
 911         struct file_struct *file;
 912         char fbuf[MAXPATHLEN];
 913         extern int delete_excluded;
 914
 915         /* f is set to -1 when calculating deletion file list */
 916         file = make_file(fname, flist,
 917             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 918
 919         if (!file)
 920                 return;
 921
 922         maybe_emit_filelist_progress(flist);
 923
 924         flist_expand(flist);
 925
 926         if (write_batch)
 927                 file->flags |= FLAG_TOP_DIR;
 928
 929         if (file->basename[0]) {
 930                 flist->files[flist->count++] = file;
 931                 send_file_entry(file, f, base_flags);
 932         }
 933
 934         if (recursive && S_ISDIR(file->mode)
 935             && !(file->flags & FLAG_MOUNT_POINT)) {
 936                 struct exclude_struct **last_exclude_list = local_exclude_list;
 937                 send_directory(f, flist, f_name_to(file, fbuf));
 938                 local_exclude_list = last_exclude_list;
 939                 return;
 940         }
 941 }
 942
 943
 944 static void send_directory(int f, struct file_list *flist, char *dir)
 945 {
 946         DIR *d;
 947         struct dirent *di;
 948         char fname[MAXPATHLEN];
 949         unsigned int offset;
 950         char *p;
 951
 952         d = opendir(dir);
 953         if (!d) {
 954                 io_error |= IOERR_GENERAL;
 955                 rprintf(FERROR, "opendir %s failed: %s\n",
 956                         full_fname(dir), strerror(errno));
 957                 return;
 958         }
 959
 960         offset = strlcpy(fname, dir, MAXPATHLEN);
 961         p = fname + offset;
 962         if (offset >= MAXPATHLEN || p[-1] != '/') {
 963                 if (offset >= MAXPATHLEN - 1) {
 964                         io_error |= IOERR_GENERAL;
 965                         rprintf(FERROR, "skipping long-named directory: %s\n",
 966                                 full_fname(fname));
 967                         closedir(d);
 968                         return;
 969                 }
 970                 *p++ = '/';
 971                 offset++;
 972         }
 973
 974         local_exclude_list = NULL;
 975
 976         if (cvs_exclude) {
 977                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 978                     < MAXPATHLEN - offset)
 979                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 980                 else {
 981                         io_error |= IOERR_GENERAL;
 982                         rprintf(FINFO,
 983                                 "cannot cvs-exclude in long-named directory %s\n",
 984                                 full_fname(fname));
 985                 }
 986         }
 987
 988         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 989                 char *dname = d_name(di);
 990                 if (dname[0] == '.' && (dname[1] == '\0'
 991                     || (dname[1] == '.' && dname[2] == '\0')))
 992                         continue;
 993                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 994                         send_file_name(f, flist, fname, recurse, 0);
 995                 else {
 996                         io_error |= IOERR_GENERAL;
 997                         rprintf(FINFO,
 998                                 "cannot send long-named file %s\n",
 999                                 full_fname(fname));
1000                 }
1001         }
1002         if (errno) {
1003                 io_error |= IOERR_GENERAL;
1004                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1005                         dir, errno, strerror(errno));
1006         }
1007
1008         if (local_exclude_list)
1009                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1010
1011         closedir(d);
1012 }
1013
1014
1015 /**
1016  * The delete_files() function in receiver.c sets f to -1 so that we just
1017  * construct the file list in memory without sending it over the wire.  It
1018  * also has the side-effect of ignoring user-excludes if delete_excluded
1019  * is set (so that the delete list includes user-excluded files).
1020  **/
1021 struct file_list *send_file_list(int f, int argc, char *argv[])
1022 {
1023         int l;
1024         STRUCT_STAT st;
1025         char *p, *dir, olddir[sizeof curr_dir];
1026         char lastpath[MAXPATHLEN] = "";
1027         struct file_list *flist;
1028         int64 start_write;
1029         int use_ff_fd = 0;
1030
1031         if (show_filelist_p() && f != -1)
1032                 start_filelist_progress("building file list");
1033
1034         start_write = stats.total_written;
1035
1036         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1037             "send_file_list");
1038
1039         if (f != -1) {
1040                 io_start_buffering_out(f);
1041                 if (filesfrom_fd >= 0) {
1042                         if (argv[0] && !push_dir(argv[0])) {
1043                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1044                                         full_fname(argv[0]), strerror(errno));
1045                                 exit_cleanup(RERR_FILESELECT);
1046                         }
1047                         use_ff_fd = 1;
1048                 }
1049         }
1050
1051         while (1) {
1052                 char fname2[MAXPATHLEN];
1053                 char *fname = fname2;
1054
1055                 if (use_ff_fd) {
1056                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1057                                 break;
1058                         sanitize_path(fname, NULL);
1059                 } else {
1060                         if (argc-- == 0)
1061                                 break;
1062                         strlcpy(fname, *argv++, MAXPATHLEN);
1063                         if (sanitize_paths)
1064                                 sanitize_path(fname, NULL);
1065                 }
1066
1067                 l = strlen(fname);
1068                 if (fname[l - 1] == '/') {
1069                         if (l == 2 && fname[0] == '.') {
1070                                 /* Turn "./" into just "." rather than "./." */
1071                                 fname[1] = '\0';
1072                         } else if (l < MAXPATHLEN) {
1073                                 fname[l++] = '.';
1074                                 fname[l] = '\0';
1075                         }
1076                 }
1077
1078                 if (link_stat(fname, &st) != 0) {
1079                         if (f != -1) {
1080                                 io_error |= IOERR_GENERAL;
1081                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1082                                         full_fname(fname), strerror(errno));
1083                         }
1084                         continue;
1085                 }
1086
1087                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1088                         rprintf(FINFO, "skipping directory %s\n", fname);
1089                         continue;
1090                 }
1091
1092                 dir = NULL;
1093                 olddir[0] = '\0';
1094
1095                 if (!relative_paths) {
1096                         p = strrchr(fname, '/');
1097                         if (p) {
1098                                 *p = 0;
1099                                 if (p == fname)
1100                                         dir = "/";
1101                                 else
1102                                         dir = fname;
1103                                 fname = p + 1;
1104                         }
1105                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1106                         /* this ensures we send the intermediate directories,
1107                            thus getting their permissions right */
1108                         char *lp = lastpath, *fn = fname, *slash = fname;
1109                         *p = 0;
1110                         /* Skip any initial directories in our path that we
1111                          * have in common with lastpath. */
1112                         while (*fn && *lp == *fn) {
1113                                 if (*fn == '/')
1114                                         slash = fn;
1115                                 lp++, fn++;
1116                         }
1117                         *p = '/';
1118                         if (fn != p || (*lp && *lp != '/')) {
1119                                 int copy_links_saved = copy_links;
1120                                 int recurse_saved = recurse;
1121                                 copy_links = copy_unsafe_links;
1122                                 /* set recurse to 1 to prevent make_file
1123                                  * from ignoring directory, but still
1124                                  * turn off the recursive parameter to
1125                                  * send_file_name */
1126                                 recurse = 1;
1127                                 while ((slash = strchr(slash+1, '/')) != 0) {
1128                                         *slash = 0;
1129                                         send_file_name(f, flist, fname, 0, 0);
1130                                         *slash = '/';
1131                                 }
1132                                 copy_links = copy_links_saved;
1133                                 recurse = recurse_saved;
1134                                 *p = 0;
1135                                 strlcpy(lastpath, fname, sizeof lastpath);
1136                                 *p = '/';
1137                         }
1138                 }
1139
1140                 if (!*fname)
1141                         fname = ".";
1142
1143                 if (dir && *dir) {
1144                         static char *lastdir;
1145                         static int lastdir_len;
1146
1147                         strcpy(olddir, curr_dir); /* can't overflow */
1148
1149                         if (!push_dir(dir)) {
1150                                 io_error |= IOERR_GENERAL;
1151                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1152                                         full_fname(dir), strerror(errno));
1153                                 continue;
1154                         }
1155
1156                         if (lastdir && strcmp(lastdir, dir) == 0) {
1157                                 flist_dir = lastdir;
1158                                 flist_dir_len = lastdir_len;
1159                         } else {
1160                                 flist_dir = lastdir = strdup(dir);
1161                                 flist_dir_len = lastdir_len = strlen(dir);
1162                         }
1163                 }
1164
1165                 if (one_file_system)
1166                         set_filesystem(fname);
1167
1168                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1169
1170                 if (olddir[0]) {
1171                         flist_dir = NULL;
1172                         flist_dir_len = 0;
1173                         if (!pop_dir(olddir)) {
1174                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1175                                         full_fname(dir), strerror(errno));
1176                                 exit_cleanup(RERR_FILESELECT);
1177                         }
1178                 }
1179         }
1180
1181         if (f != -1) {
1182                 send_file_entry(NULL, f, 0);
1183
1184                 if (show_filelist_p())
1185                         finish_filelist_progress(flist);
1186         }
1187
1188         if (flist->hlink_pool) {
1189                 pool_destroy(flist->hlink_pool);
1190                 flist->hlink_pool = NULL;
1191         }
1192
1193         clean_flist(flist, 0, 0);
1194
1195         if (f != -1) {
1196                 /* Now send the uid/gid list. This was introduced in
1197                  * protocol version 15 */
1198                 send_uid_list(f);
1199
1200                 /* send the io_error flag */
1201                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1202
1203                 io_end_buffering();
1204                 stats.flist_size = stats.total_written - start_write;
1205                 stats.num_files = flist->count;
1206                 if (write_batch)
1207                         write_batch_flist_info(flist->count, flist->files);
1208         }
1209
1210         if (verbose > 3)
1211                 output_flist(flist);
1212
1213         if (verbose > 2)
1214                 rprintf(FINFO, "send_file_list done\n");
1215
1216         return flist;
1217 }
1218
1219
1220 struct file_list *recv_file_list(int f)
1221 {
1222         struct file_list *flist;
1223         unsigned short flags;
1224         int64 start_read;
1225         extern int list_only;
1226
1227         if (show_filelist_p())
1228                 start_filelist_progress("receiving file list");
1229
1230         start_read = stats.total_read;
1231
1232         flist = flist_new(WITH_HLINK, "recv_file_list");
1233
1234         flist->count = 0;
1235         flist->malloced = 1000;
1236         flist->files = new_array(struct file_struct *, flist->malloced);
1237         if (!flist->files)
1238                 goto oom;
1239
1240
1241         while ((flags = read_byte(f)) != 0) {
1242                 int i = flist->count;
1243
1244                 flist_expand(flist);
1245
1246                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1247                         flags |= read_byte(f) << 8;
1248                 receive_file_entry(&flist->files[i], flags, flist, f);
1249
1250                 if (S_ISREG(flist->files[i]->mode))
1251                         stats.total_size += flist->files[i]->length;
1252
1253                 flist->count++;
1254
1255                 maybe_emit_filelist_progress(flist);
1256
1257                 if (verbose > 2) {
1258                         rprintf(FINFO, "recv_file_name(%s)\n",
1259                                 f_name(flist->files[i]));
1260                 }
1261         }
1262         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1263
1264         if (verbose > 2)
1265                 rprintf(FINFO, "received %d names\n", flist->count);
1266
1267         if (show_filelist_p())
1268                 finish_filelist_progress(flist);
1269
1270         clean_flist(flist, relative_paths, 1);
1271
1272         if (f != -1) {
1273                 /* Now send the uid/gid list. This was introduced in
1274                  * protocol version 15 */
1275                 recv_uid_list(f, flist);
1276
1277                 if (!read_batch) {
1278                         /* Recv the io_error flag */
1279                         if (lp_ignore_errors(module_id) || ignore_errors)
1280                                 read_int(f);
1281                         else
1282                                 io_error |= read_int(f);
1283                 }
1284         }
1285
1286         if (verbose > 3)
1287                 output_flist(flist);
1288
1289         if (list_only) {
1290                 int i;
1291                 for (i = 0; i < flist->count; i++)
1292                         list_file_entry(flist->files[i]);
1293         }
1294
1295         if (verbose > 2)
1296                 rprintf(FINFO, "recv_file_list done\n");
1297
1298         stats.flist_size = stats.total_read - start_read;
1299         stats.num_files = flist->count;
1300
1301         return flist;
1302
1303 oom:
1304         out_of_memory("recv_file_list");
1305         return NULL;            /* not reached */
1306 }
1307
1308
1309 int file_compare(struct file_struct **file1, struct file_struct **file2)
1310 {
1311         struct file_struct *f1 = *file1;
1312         struct file_struct *f2 = *file2;
1313
1314         if (!f1->basename && !f2->basename)
1315                 return 0;
1316         if (!f1->basename)
1317                 return -1;
1318         if (!f2->basename)
1319                 return 1;
1320         if (f1->dirname == f2->dirname)
1321                 return u_strcmp(f1->basename, f2->basename);
1322         return f_name_cmp(f1, f2);
1323 }
1324
1325
1326 int flist_find(struct file_list *flist, struct file_struct *f)
1327 {
1328         int low = 0, high = flist->count - 1;
1329
1330         while (high >= 0 && !flist->files[high]->basename) high--;
1331
1332         if (high < 0)
1333                 return -1;
1334
1335         while (low != high) {
1336                 int mid = (low + high) / 2;
1337                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1338                 if (ret == 0)
1339                         return flist_up(flist, mid);
1340                 if (ret > 0)
1341                         high = mid;
1342                 else
1343                         low = mid + 1;
1344         }
1345
1346         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1347                 return flist_up(flist, low);
1348         return -1;
1349 }
1350
1351 /*
1352  * Free up any resources a file_struct has allocated
1353  * and clear the file.
1354  */
1355 void clear_file(int i, struct file_list *flist)
1356 {
1357         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1358                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1359         memset(flist->files[i], 0, file_struct_len);
1360 }
1361
1362
1363 /*
1364  * allocate a new file list
1365  */
1366 struct file_list *flist_new(int with_hlink, char *msg)
1367 {
1368         struct file_list *flist;
1369
1370         flist = new(struct file_list);
1371         if (!flist)
1372                 out_of_memory(msg);
1373
1374         memset(flist, 0, sizeof (struct file_list));
1375
1376         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1377             out_of_memory, POOL_INTERN)))
1378                 out_of_memory(msg);
1379
1380 #if SUPPORT_HARD_LINKS
1381         if (with_hlink && preserve_hard_links) {
1382                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1383                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1384                         out_of_memory(msg);
1385         }
1386 #endif
1387
1388         return flist;
1389 }
1390
1391 /*
1392  * free up all elements in a flist
1393  */
1394 void flist_free(struct file_list *flist)
1395 {
1396         pool_destroy(flist->file_pool);
1397         pool_destroy(flist->hlink_pool);
1398         free(flist->files);
1399         free(flist);
1400 }
1401
1402
1403 /*
1404  * This routine ensures we don't have any duplicate names in our file list.
1405  * duplicate names can cause corruption because of the pipelining
1406  */
1407 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1408 {
1409         int i, prev_i = 0;
1410
1411         if (!flist || flist->count == 0)
1412                 return;
1413
1414         qsort(flist->files, flist->count,
1415             sizeof flist->files[0], (int (*)()) file_compare);
1416
1417         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1418                 if (flist->files[i]->basename) {
1419                         prev_i = i;
1420                         break;
1421                 }
1422         }
1423         while (++i < flist->count) {
1424                 if (!flist->files[i]->basename)
1425                         continue;
1426                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1427                         if (verbose > 1 && !am_server) {
1428                                 rprintf(FINFO,
1429                                         "removing duplicate name %s from file list %d\n",
1430                                         f_name(flist->files[i]), i);
1431                         }
1432                         /* Make sure that if we unduplicate '.', that we don't
1433                          * lose track of a user-specified starting point (or
1434                          * else deletions will mysteriously fail with -R). */
1435                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1436                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1437
1438                         clear_file(i, flist);
1439                 } else
1440                         prev_i = i;
1441         }
1442
1443         if (strip_root) {
1444                 /* we need to strip off the root directory in the case
1445                    of relative paths, but this must be done _after_
1446                    the sorting phase */
1447                 for (i = 0; i < flist->count; i++) {
1448                         if (flist->files[i]->dirname &&
1449                             flist->files[i]->dirname[0] == '/') {
1450                                 memmove(&flist->files[i]->dirname[0],
1451                                         &flist->files[i]->dirname[1],
1452                                         strlen(flist->files[i]->dirname));
1453                         }
1454
1455                         if (flist->files[i]->dirname &&
1456                             !flist->files[i]->dirname[0]) {
1457                                 flist->files[i]->dirname = NULL;
1458                         }
1459                 }
1460         }
1461 }
1462
1463 static void output_flist(struct file_list *flist)
1464 {
1465         char uidbuf[16], gidbuf[16];
1466         struct file_struct *file;
1467         int i;
1468
1469         for (i = 0; i < flist->count; i++) {
1470                 file = flist->files[i];
1471                 if (am_root && preserve_uid)
1472                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1473                 else
1474                         *uidbuf = '\0';
1475                 if (preserve_gid && file->gid != GID_NONE)
1476                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1477                 else
1478                         *gidbuf = '\0';
1479                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1480                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1481                         NS(file->basename), (int) file->mode,
1482                         (double) file->length, uidbuf, gidbuf);
1483         }
1484 }
1485
1486
1487 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1488
1489 /* Compare the names of two file_struct entities, just like strcmp()
1490  * would do if it were operating on the joined strings.  We assume
1491  * that there are no 0-length strings.
1492  */
1493 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1494 {
1495         int dif;
1496         const uchar *c1, *c2;
1497         enum fnc_state state1, state2;
1498
1499         if (!f1 || !f1->basename) {
1500                 if (!f2 || !f2->basename)
1501                         return 0;
1502                 return -1;
1503         }
1504         if (!f2 || !f2->basename)
1505                 return 1;
1506
1507         if (!(c1 = (uchar*)f1->dirname)) {
1508                 state1 = fnc_BASE;
1509                 c1 = (uchar*)f1->basename;
1510         } else
1511                 state1 = fnc_DIR;
1512         if (!(c2 = (uchar*)f2->dirname)) {
1513                 state2 = fnc_BASE;
1514                 c2 = (uchar*)f2->basename;
1515         } else
1516                 state2 = fnc_DIR;
1517
1518         while (1) {
1519                 if ((dif = (int)*c1 - (int)*c2) != 0)
1520                         break;
1521                 if (!*++c1) {
1522                         switch (state1) {
1523                         case fnc_DIR:
1524                                 state1 = fnc_SLASH;
1525                                 c1 = (uchar*)"/";
1526                                 break;
1527                         case fnc_SLASH:
1528                                 state1 = fnc_BASE;
1529                                 c1 = (uchar*)f1->basename;
1530                                 break;
1531                         case fnc_BASE:
1532                                 break;
1533                         }
1534                 }
1535                 if (!*++c2) {
1536                         switch (state2) {
1537                         case fnc_DIR:
1538                                 state2 = fnc_SLASH;
1539                                 c2 = (uchar*)"/";
1540                                 break;
1541                         case fnc_SLASH:
1542                                 state2 = fnc_BASE;
1543                                 c2 = (uchar*)f2->basename;
1544                                 break;
1545                         case fnc_BASE:
1546                                 if (!*c1)
1547                                         return 0;
1548                                 break;
1549                         }
1550                 }
1551         }
1552
1553         return dif;
1554 }
1555
1556
1557 /* Return a copy of the full filename of a flist entry, using the indicated
1558  * buffer.  No size-checking is done because we checked the size when creating
1559  * the file_struct entry.
1560  */
1561 char *f_name_to(struct file_struct *f, char *fbuf)
1562 {
1563         if (!f || !f->basename)
1564                 return NULL;
1565
1566         if (f->dirname) {
1567                 int len = strlen(f->dirname);
1568                 memcpy(fbuf, f->dirname, len);
1569                 fbuf[len] = '/';
1570                 strcpy(fbuf + len + 1, f->basename);
1571         } else
1572                 strcpy(fbuf, f->basename);
1573         return fbuf;
1574 }
1575
1576
1577 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1578  */
1579 char *f_name(struct file_struct *f)
1580 {
1581         static char names[5][MAXPATHLEN];
1582         static unsigned int n;
1583
1584         n = (n + 1) % (sizeof names / sizeof names[0]);
1585
1586         return f_name_to(f, names[n]);
1587 }