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                         rdev = file->u.rdev;
 371                         if ((rdev & ~(DEV64_T)0xFF) == rdev_high)
 372                                 flags |= XMIT_SAME_HIGH_RDEV;
 373                         else
 374                                 rdev_high = rdev & ~(DEV64_T)0xFF;
 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 & ~(DEV64_T)0xFF;
 597                         } else
 598                                 rdev = rdev_high | (DEV64_T)read_byte(f);
 599                 }
 600         }
 601
 602 #if SUPPORT_LINKS
 603         if (preserve_links && S_ISLNK(mode)) {
 604                 linkname_len = read_int(f) + 1; /* count the '\0' */
 605                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 606                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 607                                 linkname_len - 1);
 608                         overflow("receive_file_entry");
 609                 }
 610         }
 611         else
 612 #endif
 613                 linkname_len = 0;
 614
 615         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 616
 617         alloc_len = file_struct_len + dirname_len + basename_len
 618                   + linkname_len + sum_len;
 619         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 620
 621         file = *fptr = (struct file_struct *)bp;
 622         memset(bp, 0, file_struct_len);
 623         bp += file_struct_len;
 624
 625         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 626         file->modtime = modtime;
 627         file->length = file_length;
 628         file->mode = mode;
 629         file->uid = uid;
 630         file->gid = gid;
 631
 632         if (dirname_len) {
 633                 file->dirname = lastdir = bp;
 634                 lastdir_len = dirname_len - 1;
 635                 memcpy(bp, dirname, dirname_len - 1);
 636                 bp += dirname_len;
 637                 bp[-1] = '\0';
 638         } else if (dirname)
 639                 file->dirname = dirname;
 640
 641         file->basename = bp;
 642         memcpy(bp, basename, basename_len);
 643         bp += basename_len;
 644
 645         if (preserve_devices && IS_DEVICE(mode))
 646                 file->u.rdev = rdev;
 647
 648 #if SUPPORT_LINKS
 649         if (linkname_len) {
 650                 file->u.link = bp;
 651                 read_sbuf(f, bp, linkname_len - 1);
 652                 if (sanitize_paths)
 653                         sanitize_path(bp, lastdir);
 654                 bp += linkname_len;
 655         }
 656 #endif
 657
 658 #if SUPPORT_HARD_LINKS
 659         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 660                 flags |= XMIT_HAS_IDEV_DATA;
 661         if (flags & XMIT_HAS_IDEV_DATA) {
 662                 INO64_T inode;
 663                 if (protocol_version < 26) {
 664                         dev = read_int(f);
 665                         inode = read_int(f);
 666                 } else {
 667                         if (!(flags & XMIT_SAME_DEV))
 668                                 dev = read_longint(f);
 669                         inode = read_longint(f);
 670                 }
 671                 if (flist->hlink_pool) {
 672                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 673                             struct idev, 1, "inode_table");
 674                         file->F_INODE = inode;
 675                         file->F_DEV = dev;
 676                 }
 677         }
 678 #endif
 679
 680         if (always_checksum) {
 681                 char *sum;
 682                 if (sum_len) {
 683                         file->u.sum = sum = bp;
 684                         /*bp += sum_len;*/
 685                 } else if (protocol_version < 28) {
 686                         /* Prior to 28, we get a useless set of nulls. */
 687                         sum = empty_sum;
 688                 } else
 689                         sum = NULL;
 690                 if (sum) {
 691                         read_buf(f, sum,
 692                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 693                 }
 694         }
 695
 696         if (!preserve_perms) {
 697                 extern int orig_umask;
 698                 /* set an appropriate set of permissions based on original
 699                  * permissions and umask. This emulates what GNU cp does */
 700                 file->mode &= ~orig_umask;
 701         }
 702 }
 703
 704
 705 /**
 706  * Create a file_struct for a named file by reading its stat()
 707  * information and performing extensive checks against global
 708  * options.
 709  *
 710  * @return the new file, or NULL if there was an error or this file
 711  * should be excluded.
 712  *
 713  * @todo There is a small optimization opportunity here to avoid
 714  * stat()ing the file in some circumstances, which has a certain cost.
 715  * We are called immediately after doing readdir(), and so we may
 716  * already know the d_type of the file.  We could for example avoid
 717  * statting directories if we're not recursing, but this is not a very
 718  * important case.  Some systems may not have d_type.
 719  **/
 720 struct file_struct *make_file(char *fname,
 721     struct file_list *flist, int exclude_level)
 722 {
 723         static char *lastdir;
 724         static int lastdir_len = -1;
 725         struct file_struct *file;
 726         STRUCT_STAT st;
 727         char sum[SUM_LENGTH];
 728         char thisname[MAXPATHLEN];
 729         char linkname[MAXPATHLEN];
 730         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 731         char *basename, *dirname, *bp;
 732         unsigned short flags = 0;
 733
 734         if (!flist)     /* lastdir isn't valid if flist is NULL */
 735                 lastdir_len = -1;
 736
 737         if (strlcpy(thisname, fname, sizeof thisname)
 738             >= sizeof thisname - flist_dir_len) {
 739                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 740                 return NULL;
 741         }
 742         clean_fname(thisname);
 743         if (sanitize_paths)
 744                 sanitize_path(thisname, NULL);
 745
 746         memset(sum, 0, SUM_LENGTH);
 747
 748         if (readlink_stat(thisname, &st, linkname) != 0) {
 749                 int save_errno = errno;
 750                 if (errno == ENOENT) {
 751                         enum logcode c = am_daemon && protocol_version < 28
 752                             ? FERROR : FINFO;
 753                         /* either symlink pointing nowhere or file that
 754                          * was removed during rsync run; see if excluded
 755                          * before reporting an error */
 756                         if (exclude_level != NO_EXCLUDES
 757                             && check_exclude_file(thisname, 0, exclude_level)) {
 758                                 /* file is excluded anyway, ignore silently */
 759                                 return NULL;
 760                         }
 761                         io_error |= IOERR_VANISHED;
 762                         rprintf(c, "file has vanished: %s\n",
 763                             full_fname(thisname));
 764                 }
 765                 else {
 766                         io_error |= IOERR_GENERAL;
 767                         rprintf(FERROR, "readlink %s failed: %s\n",
 768                             full_fname(thisname), strerror(save_errno));
 769                 }
 770                 return NULL;
 771         }
 772
 773         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 774         if (exclude_level == NO_EXCLUDES)
 775                 goto skip_excludes;
 776
 777         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 778                 rprintf(FINFO, "skipping directory %s\n", thisname);
 779                 return NULL;
 780         }
 781
 782         /* We only care about directories because we need to avoid recursing
 783          * into a mount-point directory, not to avoid copying a symlinked
 784          * file if -L (or similar) was specified. */
 785         if (one_file_system && st.st_dev != filesystem_dev
 786             && S_ISDIR(st.st_mode))
 787                 flags |= FLAG_MOUNT_POINT;
 788
 789         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 790                 return NULL;
 791
 792         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 793                 return NULL;
 794
 795 skip_excludes:
 796
 797         if (verbose > 2) {
 798                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 799                         who_am_i(), thisname, exclude_level);
 800         }
 801
 802         if ((basename = strrchr(thisname, '/')) != NULL) {
 803                 dirname_len = ++basename - thisname; /* counts future '\0' */
 804                 if (lastdir_len == dirname_len - 1
 805                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 806                         dirname = lastdir;
 807                         dirname_len = 0; /* indicates no copy is needed */
 808                 } else
 809                         dirname = thisname;
 810         } else {
 811                 basename = thisname;
 812                 dirname = NULL;
 813                 dirname_len = 0;
 814         }
 815         basename_len = strlen(basename) + 1; /* count the '\0' */
 816
 817 #if SUPPORT_LINKS
 818         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 819 #else
 820         linkname_len = 0;
 821 #endif
 822
 823         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 824
 825         alloc_len = file_struct_len + dirname_len + basename_len
 826             + linkname_len + sum_len;
 827         if (flist) {
 828                 bp = pool_alloc(flist->file_pool, alloc_len,
 829                     "receive_file_entry");
 830         } else {
 831                 if (!(bp = new_array(char, alloc_len)))
 832                         out_of_memory("receive_file_entry");
 833         }
 834
 835         file = (struct file_struct *)bp;
 836         memset(bp, 0, file_struct_len);
 837         bp += file_struct_len;
 838
 839         file->flags = flags;
 840         file->modtime = st.st_mtime;
 841         file->length = st.st_size;
 842         file->mode = st.st_mode;
 843         file->uid = st.st_uid;
 844         file->gid = st.st_gid;
 845
 846 #if SUPPORT_HARD_LINKS
 847         if (flist && flist->hlink_pool) {
 848                 if (protocol_version < 28) {
 849                         if (S_ISREG(st.st_mode))
 850                                 file->link_u.idev = pool_talloc(
 851                                     flist->hlink_pool, struct idev, 1,
 852                                     "inode_table");
 853                 } else {
 854                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 855                                 file->link_u.idev = pool_talloc(
 856                                     flist->hlink_pool, struct idev, 1,
 857                                     "inode_table");
 858                 }
 859         }
 860         if (file->link_u.idev) {
 861                 file->F_DEV = st.st_dev;
 862                 file->F_INODE = st.st_ino;
 863         }
 864 #endif
 865
 866         if (dirname_len) {
 867                 file->dirname = lastdir = bp;
 868                 lastdir_len = dirname_len - 1;
 869                 memcpy(bp, dirname, dirname_len - 1);
 870                 bp += dirname_len;
 871                 bp[-1] = '\0';
 872         } else if (dirname)
 873                 file->dirname = dirname;
 874
 875         file->basename = bp;
 876         memcpy(bp, basename, basename_len);
 877         bp += basename_len;
 878
 879 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 880         if (preserve_devices && IS_DEVICE(st.st_mode))
 881                 file->u.rdev = st.st_rdev;
 882 #endif
 883
 884 #if SUPPORT_LINKS
 885         if (linkname_len) {
 886                 file->u.link = bp;
 887                 memcpy(bp, linkname, linkname_len);
 888                 bp += linkname_len;
 889         }
 890 #endif
 891
 892         if (sum_len) {
 893                 file->u.sum = bp;
 894                 file_checksum(thisname, bp, st.st_size);
 895                 /*bp += sum_len;*/
 896         }
 897
 898         file->basedir = flist_dir;
 899
 900         if (!S_ISDIR(st.st_mode))
 901                 stats.total_size += st.st_size;
 902
 903         return file;
 904 }
 905
 906
 907 void send_file_name(int f, struct file_list *flist, char *fname,
 908                     int recursive, unsigned short base_flags)
 909 {
 910         struct file_struct *file;
 911         char fbuf[MAXPATHLEN];
 912         extern int delete_excluded;
 913
 914         /* f is set to -1 when calculating deletion file list */
 915         file = make_file(fname, flist,
 916             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 917
 918         if (!file)
 919                 return;
 920
 921         maybe_emit_filelist_progress(flist);
 922
 923         flist_expand(flist);
 924
 925         if (write_batch)
 926                 file->flags |= FLAG_TOP_DIR;
 927
 928         if (file->basename[0]) {
 929                 flist->files[flist->count++] = file;
 930                 send_file_entry(file, f, base_flags);
 931         }
 932
 933         if (recursive && S_ISDIR(file->mode)
 934             && !(file->flags & FLAG_MOUNT_POINT)) {
 935                 struct exclude_struct **last_exclude_list = local_exclude_list;
 936                 send_directory(f, flist, f_name_to(file, fbuf));
 937                 local_exclude_list = last_exclude_list;
 938                 return;
 939         }
 940 }
 941
 942
 943 static void send_directory(int f, struct file_list *flist, char *dir)
 944 {
 945         DIR *d;
 946         struct dirent *di;
 947         char fname[MAXPATHLEN];
 948         unsigned int offset;
 949         char *p;
 950
 951         d = opendir(dir);
 952         if (!d) {
 953                 io_error |= IOERR_GENERAL;
 954                 rprintf(FERROR, "opendir %s failed: %s\n",
 955                         full_fname(dir), strerror(errno));
 956                 return;
 957         }
 958
 959         offset = strlcpy(fname, dir, MAXPATHLEN);
 960         p = fname + offset;
 961         if (offset >= MAXPATHLEN || p[-1] != '/') {
 962                 if (offset >= MAXPATHLEN - 1) {
 963                         io_error |= IOERR_GENERAL;
 964                         rprintf(FERROR, "skipping long-named directory: %s\n",
 965                                 full_fname(fname));
 966                         closedir(d);
 967                         return;
 968                 }
 969                 *p++ = '/';
 970                 offset++;
 971         }
 972
 973         local_exclude_list = NULL;
 974
 975         if (cvs_exclude) {
 976                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 977                     < MAXPATHLEN - offset)
 978                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 979                 else {
 980                         io_error |= IOERR_GENERAL;
 981                         rprintf(FINFO,
 982                                 "cannot cvs-exclude in long-named directory %s\n",
 983                                 full_fname(fname));
 984                 }
 985         }
 986
 987         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 988                 char *dname = d_name(di);
 989                 if (dname[0] == '.' && (dname[1] == '\0'
 990                     || (dname[1] == '.' && dname[2] == '\0')))
 991                         continue;
 992                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 993                         send_file_name(f, flist, fname, recurse, 0);
 994                 else {
 995                         io_error |= IOERR_GENERAL;
 996                         rprintf(FINFO,
 997                                 "cannot send long-named file %s\n",
 998                                 full_fname(fname));
 999                 }
1000         }
1001         if (errno) {
1002                 io_error |= IOERR_GENERAL;
1003                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1004                         dir, errno, strerror(errno));
1005         }
1006
1007         if (local_exclude_list)
1008                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1009
1010         closedir(d);
1011 }
1012
1013
1014 /**
1015  * The delete_files() function in receiver.c sets f to -1 so that we just
1016  * construct the file list in memory without sending it over the wire.  It
1017  * also has the side-effect of ignoring user-excludes if delete_excluded
1018  * is set (so that the delete list includes user-excluded files).
1019  **/
1020 struct file_list *send_file_list(int f, int argc, char *argv[])
1021 {
1022         int l;
1023         STRUCT_STAT st;
1024         char *p, *dir, olddir[sizeof curr_dir];
1025         char lastpath[MAXPATHLEN] = "";
1026         struct file_list *flist;
1027         int64 start_write;
1028         int use_ff_fd = 0;
1029
1030         if (show_filelist_p() && f != -1)
1031                 start_filelist_progress("building file list");
1032
1033         start_write = stats.total_written;
1034
1035         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1036             "send_file_list");
1037
1038         if (f != -1) {
1039                 io_start_buffering_out(f);
1040                 if (filesfrom_fd >= 0) {
1041                         if (argv[0] && !push_dir(argv[0])) {
1042                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1043                                         full_fname(argv[0]), strerror(errno));
1044                                 exit_cleanup(RERR_FILESELECT);
1045                         }
1046                         use_ff_fd = 1;
1047                 }
1048         }
1049
1050         while (1) {
1051                 char fname2[MAXPATHLEN];
1052                 char *fname = fname2;
1053
1054                 if (use_ff_fd) {
1055                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1056                                 break;
1057                         sanitize_path(fname, NULL);
1058                 } else {
1059                         if (argc-- == 0)
1060                                 break;
1061                         strlcpy(fname, *argv++, MAXPATHLEN);
1062                         if (sanitize_paths)
1063                                 sanitize_path(fname, NULL);
1064                 }
1065
1066                 l = strlen(fname);
1067                 if (fname[l - 1] == '/') {
1068                         if (l == 2 && fname[0] == '.') {
1069                                 /* Turn "./" into just "." rather than "./." */
1070                                 fname[1] = '\0';
1071                         } else if (l < MAXPATHLEN) {
1072                                 fname[l++] = '.';
1073                                 fname[l] = '\0';
1074                         }
1075                 }
1076
1077                 if (link_stat(fname, &st) != 0) {
1078                         if (f != -1) {
1079                                 io_error |= IOERR_GENERAL;
1080                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1081                                         full_fname(fname), strerror(errno));
1082                         }
1083                         continue;
1084                 }
1085
1086                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1087                         rprintf(FINFO, "skipping directory %s\n", fname);
1088                         continue;
1089                 }
1090
1091                 dir = NULL;
1092                 olddir[0] = '\0';
1093
1094                 if (!relative_paths) {
1095                         p = strrchr(fname, '/');
1096                         if (p) {
1097                                 *p = 0;
1098                                 if (p == fname)
1099                                         dir = "/";
1100                                 else
1101                                         dir = fname;
1102                                 fname = p + 1;
1103                         }
1104                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1105                         /* this ensures we send the intermediate directories,
1106                            thus getting their permissions right */
1107                         char *lp = lastpath, *fn = fname, *slash = fname;
1108                         *p = 0;
1109                         /* Skip any initial directories in our path that we
1110                          * have in common with lastpath. */
1111                         while (*fn && *lp == *fn) {
1112                                 if (*fn == '/')
1113                                         slash = fn;
1114                                 lp++, fn++;
1115                         }
1116                         *p = '/';
1117                         if (fn != p || (*lp && *lp != '/')) {
1118                                 int copy_links_saved = copy_links;
1119                                 int recurse_saved = recurse;
1120                                 copy_links = copy_unsafe_links;
1121                                 /* set recurse to 1 to prevent make_file
1122                                  * from ignoring directory, but still
1123                                  * turn off the recursive parameter to
1124                                  * send_file_name */
1125                                 recurse = 1;
1126                                 while ((slash = strchr(slash+1, '/')) != 0) {
1127                                         *slash = 0;
1128                                         send_file_name(f, flist, fname, 0, 0);
1129                                         *slash = '/';
1130                                 }
1131                                 copy_links = copy_links_saved;
1132                                 recurse = recurse_saved;
1133                                 *p = 0;
1134                                 strlcpy(lastpath, fname, sizeof lastpath);
1135                                 *p = '/';
1136                         }
1137                 }
1138
1139                 if (!*fname)
1140                         fname = ".";
1141
1142                 if (dir && *dir) {
1143                         static char *lastdir;
1144                         static int lastdir_len;
1145
1146                         strcpy(olddir, curr_dir); /* can't overflow */
1147
1148                         if (!push_dir(dir)) {
1149                                 io_error |= IOERR_GENERAL;
1150                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1151                                         full_fname(dir), strerror(errno));
1152                                 continue;
1153                         }
1154
1155                         if (lastdir && strcmp(lastdir, dir) == 0) {
1156                                 flist_dir = lastdir;
1157                                 flist_dir_len = lastdir_len;
1158                         } else {
1159                                 flist_dir = lastdir = strdup(dir);
1160                                 flist_dir_len = lastdir_len = strlen(dir);
1161                         }
1162                 }
1163
1164                 if (one_file_system)
1165                         set_filesystem(fname);
1166
1167                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1168
1169                 if (olddir[0]) {
1170                         flist_dir = NULL;
1171                         flist_dir_len = 0;
1172                         if (!pop_dir(olddir)) {
1173                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1174                                         full_fname(dir), strerror(errno));
1175                                 exit_cleanup(RERR_FILESELECT);
1176                         }
1177                 }
1178         }
1179
1180         if (f != -1) {
1181                 send_file_entry(NULL, f, 0);
1182
1183                 if (show_filelist_p())
1184                         finish_filelist_progress(flist);
1185         }
1186
1187         if (flist->hlink_pool) {
1188                 pool_destroy(flist->hlink_pool);
1189                 flist->hlink_pool = NULL;
1190         }
1191
1192         clean_flist(flist, 0, 0);
1193
1194         if (f != -1) {
1195                 /* Now send the uid/gid list. This was introduced in
1196                  * protocol version 15 */
1197                 send_uid_list(f);
1198
1199                 /* send the io_error flag */
1200                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1201
1202                 io_end_buffering();
1203                 stats.flist_size = stats.total_written - start_write;
1204                 stats.num_files = flist->count;
1205                 if (write_batch)
1206                         write_batch_flist_info(flist->count, flist->files);
1207         }
1208
1209         if (verbose > 3)
1210                 output_flist(flist);
1211
1212         if (verbose > 2)
1213                 rprintf(FINFO, "send_file_list done\n");
1214
1215         return flist;
1216 }
1217
1218
1219 struct file_list *recv_file_list(int f)
1220 {
1221         struct file_list *flist;
1222         unsigned short flags;
1223         int64 start_read;
1224         extern int list_only;
1225
1226         if (show_filelist_p())
1227                 start_filelist_progress("receiving file list");
1228
1229         start_read = stats.total_read;
1230
1231         flist = flist_new(WITH_HLINK, "recv_file_list");
1232
1233         flist->count = 0;
1234         flist->malloced = 1000;
1235         flist->files = new_array(struct file_struct *, flist->malloced);
1236         if (!flist->files)
1237                 goto oom;
1238
1239
1240         while ((flags = read_byte(f)) != 0) {
1241                 int i = flist->count;
1242
1243                 flist_expand(flist);
1244
1245                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1246                         flags |= read_byte(f) << 8;
1247                 receive_file_entry(&flist->files[i], flags, flist, f);
1248
1249                 if (S_ISREG(flist->files[i]->mode))
1250                         stats.total_size += flist->files[i]->length;
1251
1252                 flist->count++;
1253
1254                 maybe_emit_filelist_progress(flist);
1255
1256                 if (verbose > 2) {
1257                         rprintf(FINFO, "recv_file_name(%s)\n",
1258                                 f_name(flist->files[i]));
1259                 }
1260         }
1261         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1262
1263         if (verbose > 2)
1264                 rprintf(FINFO, "received %d names\n", flist->count);
1265
1266         if (show_filelist_p())
1267                 finish_filelist_progress(flist);
1268
1269         clean_flist(flist, relative_paths, 1);
1270
1271         if (f != -1) {
1272                 /* Now send the uid/gid list. This was introduced in
1273                  * protocol version 15 */
1274                 recv_uid_list(f, flist);
1275
1276                 if (!read_batch) {
1277                         /* Recv the io_error flag */
1278                         if (lp_ignore_errors(module_id) || ignore_errors)
1279                                 read_int(f);
1280                         else
1281                                 io_error |= read_int(f);
1282                 }
1283         }
1284
1285         if (verbose > 3)
1286                 output_flist(flist);
1287
1288         if (list_only) {
1289                 int i;
1290                 for (i = 0; i < flist->count; i++)
1291                         list_file_entry(flist->files[i]);
1292         }
1293
1294         if (verbose > 2)
1295                 rprintf(FINFO, "recv_file_list done\n");
1296
1297         stats.flist_size = stats.total_read - start_read;
1298         stats.num_files = flist->count;
1299
1300         return flist;
1301
1302 oom:
1303         out_of_memory("recv_file_list");
1304         return NULL;            /* not reached */
1305 }
1306
1307
1308 int file_compare(struct file_struct **file1, struct file_struct **file2)
1309 {
1310         struct file_struct *f1 = *file1;
1311         struct file_struct *f2 = *file2;
1312
1313         if (!f1->basename && !f2->basename)
1314                 return 0;
1315         if (!f1->basename)
1316                 return -1;
1317         if (!f2->basename)
1318                 return 1;
1319         if (f1->dirname == f2->dirname)
1320                 return u_strcmp(f1->basename, f2->basename);
1321         return f_name_cmp(f1, f2);
1322 }
1323
1324
1325 int flist_find(struct file_list *flist, struct file_struct *f)
1326 {
1327         int low = 0, high = flist->count - 1;
1328
1329         while (high >= 0 && !flist->files[high]->basename) high--;
1330
1331         if (high < 0)
1332                 return -1;
1333
1334         while (low != high) {
1335                 int mid = (low + high) / 2;
1336                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1337                 if (ret == 0)
1338                         return flist_up(flist, mid);
1339                 if (ret > 0)
1340                         high = mid;
1341                 else
1342                         low = mid + 1;
1343         }
1344
1345         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1346                 return flist_up(flist, low);
1347         return -1;
1348 }
1349
1350 /*
1351  * Free up any resources a file_struct has allocated
1352  * and clear the file.
1353  */
1354 void clear_file(int i, struct file_list *flist)
1355 {
1356         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1357                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1358         memset(flist->files[i], 0, file_struct_len);
1359 }
1360
1361
1362 /*
1363  * allocate a new file list
1364  */
1365 struct file_list *flist_new(int with_hlink, char *msg)
1366 {
1367         struct file_list *flist;
1368
1369         flist = new(struct file_list);
1370         if (!flist)
1371                 out_of_memory(msg);
1372
1373         memset(flist, 0, sizeof (struct file_list));
1374
1375         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1376             out_of_memory, POOL_INTERN)))
1377                 out_of_memory(msg);
1378
1379 #if SUPPORT_HARD_LINKS
1380         if (with_hlink && preserve_hard_links) {
1381                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1382                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1383                         out_of_memory(msg);
1384         }
1385 #endif
1386
1387         return flist;
1388 }
1389
1390 /*
1391  * free up all elements in a flist
1392  */
1393 void flist_free(struct file_list *flist)
1394 {
1395         pool_destroy(flist->file_pool);
1396         pool_destroy(flist->hlink_pool);
1397         free(flist->files);
1398         free(flist);
1399 }
1400
1401
1402 /*
1403  * This routine ensures we don't have any duplicate names in our file list.
1404  * duplicate names can cause corruption because of the pipelining
1405  */
1406 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1407 {
1408         int i, prev_i = 0;
1409
1410         if (!flist || flist->count == 0)
1411                 return;
1412
1413         qsort(flist->files, flist->count,
1414             sizeof flist->files[0], (int (*)()) file_compare);
1415
1416         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1417                 if (flist->files[i]->basename) {
1418                         prev_i = i;
1419                         break;
1420                 }
1421         }
1422         while (++i < flist->count) {
1423                 if (!flist->files[i]->basename)
1424                         continue;
1425                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1426                         if (verbose > 1 && !am_server) {
1427                                 rprintf(FINFO,
1428                                         "removing duplicate name %s from file list %d\n",
1429                                         f_name(flist->files[i]), i);
1430                         }
1431                         /* Make sure that if we unduplicate '.', that we don't
1432                          * lose track of a user-specified starting point (or
1433                          * else deletions will mysteriously fail with -R). */
1434                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1435                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1436
1437                         clear_file(i, flist);
1438                 } else
1439                         prev_i = i;
1440         }
1441
1442         if (strip_root) {
1443                 /* we need to strip off the root directory in the case
1444                    of relative paths, but this must be done _after_
1445                    the sorting phase */
1446                 for (i = 0; i < flist->count; i++) {
1447                         if (flist->files[i]->dirname &&
1448                             flist->files[i]->dirname[0] == '/') {
1449                                 memmove(&flist->files[i]->dirname[0],
1450                                         &flist->files[i]->dirname[1],
1451                                         strlen(flist->files[i]->dirname));
1452                         }
1453
1454                         if (flist->files[i]->dirname &&
1455                             !flist->files[i]->dirname[0]) {
1456                                 flist->files[i]->dirname = NULL;
1457                         }
1458                 }
1459         }
1460 }
1461
1462 static void output_flist(struct file_list *flist)
1463 {
1464         char uidbuf[16], gidbuf[16];
1465         struct file_struct *file;
1466         int i;
1467
1468         for (i = 0; i < flist->count; i++) {
1469                 file = flist->files[i];
1470                 if (am_root && preserve_uid)
1471                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1472                 else
1473                         *uidbuf = '\0';
1474                 if (preserve_gid && file->gid != GID_NONE)
1475                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1476                 else
1477                         *gidbuf = '\0';
1478                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1479                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1480                         NS(file->basename), (int) file->mode,
1481                         (double) file->length, uidbuf, gidbuf);
1482         }
1483 }
1484
1485
1486 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1487
1488 /* Compare the names of two file_struct entities, just like strcmp()
1489  * would do if it were operating on the joined strings.  We assume
1490  * that there are no 0-length strings.
1491  */
1492 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1493 {
1494         int dif;
1495         const uchar *c1, *c2;
1496         enum fnc_state state1, state2;
1497
1498         if (!f1 || !f1->basename) {
1499                 if (!f2 || !f2->basename)
1500                         return 0;
1501                 return -1;
1502         }
1503         if (!f2 || !f2->basename)
1504                 return 1;
1505
1506         if (!(c1 = (uchar*)f1->dirname)) {
1507                 state1 = fnc_BASE;
1508                 c1 = (uchar*)f1->basename;
1509         } else
1510                 state1 = fnc_DIR;
1511         if (!(c2 = (uchar*)f2->dirname)) {
1512                 state2 = fnc_BASE;
1513                 c2 = (uchar*)f2->basename;
1514         } else
1515                 state2 = fnc_DIR;
1516
1517         while (1) {
1518                 if ((dif = (int)*c1 - (int)*c2) != 0)
1519                         break;
1520                 if (!*++c1) {
1521                         switch (state1) {
1522                         case fnc_DIR:
1523                                 state1 = fnc_SLASH;
1524                                 c1 = (uchar*)"/";
1525                                 break;
1526                         case fnc_SLASH:
1527                                 state1 = fnc_BASE;
1528                                 c1 = (uchar*)f1->basename;
1529                                 break;
1530                         case fnc_BASE:
1531                                 break;
1532                         }
1533                 }
1534                 if (!*++c2) {
1535                         switch (state2) {
1536                         case fnc_DIR:
1537                                 state2 = fnc_SLASH;
1538                                 c2 = (uchar*)"/";
1539                                 break;
1540                         case fnc_SLASH:
1541                                 state2 = fnc_BASE;
1542                                 c2 = (uchar*)f2->basename;
1543                                 break;
1544                         case fnc_BASE:
1545                                 if (!*c1)
1546                                         return 0;
1547                                 break;
1548                         }
1549                 }
1550         }
1551
1552         return dif;
1553 }
1554
1555
1556 /* Return a copy of the full filename of a flist entry, using the indicated
1557  * buffer.  No size-checking is done because we checked the size when creating
1558  * the file_struct entry.
1559  */
1560 char *f_name_to(struct file_struct *f, char *fbuf)
1561 {
1562         if (!f || !f->basename)
1563                 return NULL;
1564
1565         if (f->dirname) {
1566                 int len = strlen(f->dirname);
1567                 memcpy(fbuf, f->dirname, len);
1568                 fbuf[len] = '/';
1569                 strcpy(fbuf + len + 1, f->basename);
1570         } else
1571                 strcpy(fbuf, f->basename);
1572         return fbuf;
1573 }
1574
1575
1576 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1577  */
1578 char *f_name(struct file_struct *f)
1579 {
1580         static char names[5][MAXPATHLEN];
1581         static unsigned int n;
1582
1583         n = (n + 1) % (sizeof names / sizeof names[0]);
1584
1585         return f_name_to(f, names[n]);
1586 }