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 & ~(DEV64_T)0xFF) == rdev_high) {
 371                                 flags |= XMIT_SAME_HIGH_RDEV;
 372                                 rdev = file->u.rdev;
 373                         } else {
 374                                 rdev = file->u.rdev;
 375                                 rdev_high = rdev & ~(DEV64_T)0xFF;
 376                         }
 377                 }
 378         }
 379         if (file->uid == uid)
 380                 flags |= XMIT_SAME_UID;
 381         else
 382                 uid = file->uid;
 383         if (file->gid == gid)
 384                 flags |= XMIT_SAME_GID;
 385         else
 386                 gid = file->gid;
 387         if (file->modtime == modtime)
 388                 flags |= XMIT_SAME_TIME;
 389         else
 390                 modtime = file->modtime;
 391
 392 #if SUPPORT_HARD_LINKS
 393         if (file->link_u.idev) {
 394                 if (file->F_DEV == dev) {
 395                         if (protocol_version >= 28)
 396                                 flags |= XMIT_SAME_DEV;
 397                 } else
 398                         dev = file->F_DEV;
 399                 flags |= XMIT_HAS_IDEV_DATA;
 400         }
 401 #endif
 402
 403         for (l1 = 0;
 404             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 405             l1++) {}
 406         l2 = strlen(fname+l1);
 407
 408         if (l1 > 0)
 409                 flags |= XMIT_SAME_NAME;
 410         if (l2 > 255)
 411                 flags |= XMIT_LONG_NAME;
 412
 413         /* We must make sure we don't send a zero flag byte or the
 414          * other end will terminate the flist transfer.  Note that
 415          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 416          * it's harmless way to add a bit to the first flag byte. */
 417         if (protocol_version >= 28) {
 418                 if (!flags && !S_ISDIR(mode))
 419                         flags |= XMIT_TOP_DIR;
 420                 if ((flags & 0xFF00) || !flags) {
 421                         flags |= XMIT_EXTENDED_FLAGS;
 422                         write_byte(f, flags);
 423                         write_byte(f, flags >> 8);
 424                 } else
 425                         write_byte(f, flags);
 426         } else {
 427                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 428                         flags |= XMIT_TOP_DIR;
 429                 if (!(flags & 0xFF))
 430                         flags |= XMIT_LONG_NAME;
 431                 write_byte(f, flags);
 432         }
 433         if (flags & XMIT_SAME_NAME)
 434                 write_byte(f, l1);
 435         if (flags & XMIT_LONG_NAME)
 436                 write_int(f, l2);
 437         else
 438                 write_byte(f, l2);
 439         write_buf(f, fname + l1, l2);
 440
 441         write_longint(f, file->length);
 442         if (!(flags & XMIT_SAME_TIME))
 443                 write_int(f, modtime);
 444         if (!(flags & XMIT_SAME_MODE))
 445                 write_int(f, to_wire_mode(mode));
 446         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 447                 if (!numeric_ids)
 448                         add_uid(uid);
 449                 write_int(f, uid);
 450         }
 451         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 452                 if (!numeric_ids)
 453                         add_gid(gid);
 454                 write_int(f, gid);
 455         }
 456         if (preserve_devices && IS_DEVICE(mode)) {
 457                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 458                  * also off. */
 459                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 460                         write_int(f, rdev);
 461                 else if (protocol_version >= 28)
 462                         write_byte(f, rdev);
 463         }
 464
 465 #if SUPPORT_LINKS
 466         if (preserve_links && S_ISLNK(mode)) {
 467                 int len = strlen(file->u.link);
 468                 write_int(f, len);
 469                 write_buf(f, file->u.link, len);
 470         }
 471 #endif
 472
 473 #if SUPPORT_HARD_LINKS
 474         if (flags & XMIT_HAS_IDEV_DATA) {
 475                 if (protocol_version < 26) {
 476                         /* 32-bit dev_t and ino_t */
 477                         write_int(f, dev);
 478                         write_int(f, file->F_INODE);
 479                 } else {
 480                         /* 64-bit dev_t and ino_t */
 481                         if (!(flags & XMIT_SAME_DEV))
 482                                 write_longint(f, dev);
 483                         write_longint(f, file->F_INODE);
 484                 }
 485         }
 486 #endif
 487
 488         if (always_checksum) {
 489                 char *sum;
 490                 if (S_ISREG(mode))
 491                         sum = file->u.sum;
 492                 else if (protocol_version < 28) {
 493                         /* Prior to 28, we sent a useless set of nulls. */
 494                         sum = empty_sum;
 495                 } else
 496                         sum = NULL;
 497                 if (sum) {
 498                         write_buf(f, sum,
 499                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 500                 }
 501         }
 502
 503         strlcpy(lastname, fname, MAXPATHLEN);
 504
 505         io_write_phase = "unknown";
 506 }
 507
 508
 509
 510 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 511     struct file_list *flist, int f)
 512 {
 513         static time_t modtime;
 514         static mode_t mode;
 515         static DEV64_T rdev, rdev_high;
 516         static DEV64_T dev;
 517         static uid_t uid;
 518         static gid_t gid;
 519         static char lastname[MAXPATHLEN], *lastdir;
 520         static int lastdir_len = -1;
 521         char thisname[MAXPATHLEN];
 522         unsigned int l1 = 0, l2 = 0;
 523         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 524         OFF_T file_length;
 525         char *basename, *dirname, *bp;
 526         struct file_struct *file;
 527
 528         if (!fptr) {
 529                 modtime = 0, mode = 0;
 530                 rdev = 0, rdev_high = 0, dev = 0;
 531                 uid = 0, gid = 0;
 532                 *lastname = '\0';
 533                 return;
 534         }
 535
 536         if (flags & XMIT_SAME_NAME)
 537                 l1 = read_byte(f);
 538
 539         if (flags & XMIT_LONG_NAME)
 540                 l2 = read_int(f);
 541         else
 542                 l2 = read_byte(f);
 543
 544         if (l2 >= MAXPATHLEN - l1) {
 545                 rprintf(FERROR,
 546                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 547                         flags, l1, l2, lastname);
 548                 overflow("receive_file_entry");
 549         }
 550
 551         strlcpy(thisname, lastname, l1 + 1);
 552         read_sbuf(f, &thisname[l1], l2);
 553         thisname[l1 + l2] = 0;
 554
 555         strlcpy(lastname, thisname, MAXPATHLEN);
 556
 557         clean_fname(thisname);
 558
 559         if (sanitize_paths)
 560                 sanitize_path(thisname, NULL);
 561
 562         if ((basename = strrchr(thisname, '/')) != NULL) {
 563                 dirname_len = ++basename - thisname; /* counts future '\0' */
 564                 if (lastdir_len == dirname_len - 1
 565                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 566                         dirname = lastdir;
 567                         dirname_len = 0; /* indicates no copy is needed */
 568                 } else
 569                         dirname = thisname;
 570         } else {
 571                 basename = thisname;
 572                 dirname = NULL;
 573                 dirname_len = 0;
 574         }
 575         basename_len = strlen(basename) + 1; /* count the '\0' */
 576
 577         file_length = read_longint(f);
 578         if (!(flags & XMIT_SAME_TIME))
 579                 modtime = (time_t)read_int(f);
 580         if (!(flags & XMIT_SAME_MODE))
 581                 mode = from_wire_mode(read_int(f));
 582
 583         if (preserve_uid && !(flags & XMIT_SAME_UID))
 584                 uid = (uid_t)read_int(f);
 585         if (preserve_gid && !(flags & XMIT_SAME_GID))
 586                 gid = (gid_t)read_int(f);
 587
 588         if (preserve_devices) {
 589                 if (protocol_version < 28) {
 590                         if (IS_DEVICE(mode)) {
 591                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 592                                         rdev = (DEV64_T)read_int(f);
 593                         } else
 594                                 rdev = 0;
 595                 } else if (IS_DEVICE(mode)) {
 596                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 597                                 rdev = (DEV64_T)read_int(f);
 598                                 rdev_high = rdev & ~(DEV64_T)0xFF;
 599                         } else
 600                                 rdev = rdev_high | (DEV64_T)read_byte(f);
 601                 }
 602         }
 603
 604 #if SUPPORT_LINKS
 605         if (preserve_links && S_ISLNK(mode)) {
 606                 linkname_len = read_int(f) + 1; /* count the '\0' */
 607                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 608                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 609                                 linkname_len - 1);
 610                         overflow("receive_file_entry");
 611                 }
 612         }
 613         else
 614 #endif
 615                 linkname_len = 0;
 616
 617         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 618
 619         alloc_len = file_struct_len + dirname_len + basename_len
 620                   + linkname_len + sum_len;
 621         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 622
 623         file = *fptr = (struct file_struct *)bp;
 624         memset(bp, 0, file_struct_len);
 625         bp += file_struct_len;
 626
 627         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 628         file->modtime = modtime;
 629         file->length = file_length;
 630         file->mode = mode;
 631         file->uid = uid;
 632         file->gid = gid;
 633
 634         if (dirname_len) {
 635                 file->dirname = lastdir = bp;
 636                 lastdir_len = dirname_len - 1;
 637                 memcpy(bp, dirname, dirname_len - 1);
 638                 bp += dirname_len;
 639                 bp[-1] = '\0';
 640         } else if (dirname)
 641                 file->dirname = dirname;
 642
 643         file->basename = bp;
 644         memcpy(bp, basename, basename_len);
 645         bp += basename_len;
 646
 647         if (preserve_devices && IS_DEVICE(mode))
 648                 file->u.rdev = rdev;
 649
 650 #if SUPPORT_LINKS
 651         if (linkname_len) {
 652                 file->u.link = bp;
 653                 read_sbuf(f, bp, linkname_len - 1);
 654                 if (sanitize_paths)
 655                         sanitize_path(bp, lastdir);
 656                 bp += linkname_len;
 657         }
 658 #endif
 659
 660 #if SUPPORT_HARD_LINKS
 661         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 662                 flags |= XMIT_HAS_IDEV_DATA;
 663         if (flags & XMIT_HAS_IDEV_DATA) {
 664                 INO64_T inode;
 665                 if (protocol_version < 26) {
 666                         dev = read_int(f);
 667                         inode = read_int(f);
 668                 } else {
 669                         if (!(flags & XMIT_SAME_DEV))
 670                                 dev = read_longint(f);
 671                         inode = read_longint(f);
 672                 }
 673                 if (flist->hlink_pool) {
 674                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 675                             struct idev, 1, "inode_table");
 676                         file->F_INODE = inode;
 677                         file->F_DEV = dev;
 678                 }
 679         }
 680 #endif
 681
 682         if (always_checksum) {
 683                 char *sum;
 684                 if (sum_len) {
 685                         file->u.sum = sum = bp;
 686                         /*bp += sum_len;*/
 687                 } else if (protocol_version < 28) {
 688                         /* Prior to 28, we get a useless set of nulls. */
 689                         sum = empty_sum;
 690                 } else
 691                         sum = NULL;
 692                 if (sum) {
 693                         read_buf(f, sum,
 694                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 695                 }
 696         }
 697
 698         if (!preserve_perms) {
 699                 extern int orig_umask;
 700                 /* set an appropriate set of permissions based on original
 701                  * permissions and umask. This emulates what GNU cp does */
 702                 file->mode &= ~orig_umask;
 703         }
 704 }
 705
 706
 707 /**
 708  * Create a file_struct for a named file by reading its stat()
 709  * information and performing extensive checks against global
 710  * options.
 711  *
 712  * @return the new file, or NULL if there was an error or this file
 713  * should be excluded.
 714  *
 715  * @todo There is a small optimization opportunity here to avoid
 716  * stat()ing the file in some circumstances, which has a certain cost.
 717  * We are called immediately after doing readdir(), and so we may
 718  * already know the d_type of the file.  We could for example avoid
 719  * statting directories if we're not recursing, but this is not a very
 720  * important case.  Some systems may not have d_type.
 721  **/
 722 struct file_struct *make_file(char *fname,
 723     struct file_list *flist, int exclude_level)
 724 {
 725         static char *lastdir;
 726         static int lastdir_len = -1;
 727         struct file_struct *file;
 728         STRUCT_STAT st;
 729         char sum[SUM_LENGTH];
 730         char thisname[MAXPATHLEN];
 731         char linkname[MAXPATHLEN];
 732         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 733         char *basename, *dirname, *bp;
 734         unsigned short flags = 0;
 735
 736         if (!flist)     /* lastdir isn't valid if flist is NULL */
 737                 lastdir_len = -1;
 738
 739         if (strlcpy(thisname, fname, sizeof thisname)
 740             >= sizeof thisname - flist_dir_len) {
 741                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 742                 return NULL;
 743         }
 744         clean_fname(thisname);
 745         if (sanitize_paths)
 746                 sanitize_path(thisname, NULL);
 747
 748         memset(sum, 0, SUM_LENGTH);
 749
 750         if (readlink_stat(thisname, &st, linkname) != 0) {
 751                 int save_errno = errno;
 752                 if (errno == ENOENT) {
 753                         enum logcode c = am_daemon && protocol_version < 28
 754                             ? FERROR : FINFO;
 755                         /* either symlink pointing nowhere or file that
 756                          * was removed during rsync run; see if excluded
 757                          * before reporting an error */
 758                         if (exclude_level != NO_EXCLUDES
 759                             && check_exclude_file(thisname, 0, exclude_level)) {
 760                                 /* file is excluded anyway, ignore silently */
 761                                 return NULL;
 762                         }
 763                         io_error |= IOERR_VANISHED;
 764                         rprintf(c, "file has vanished: %s\n",
 765                             full_fname(thisname));
 766                 }
 767                 else {
 768                         io_error |= IOERR_GENERAL;
 769                         rprintf(FERROR, "readlink %s failed: %s\n",
 770                             full_fname(thisname), strerror(save_errno));
 771                 }
 772                 return NULL;
 773         }
 774
 775         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 776         if (exclude_level == NO_EXCLUDES)
 777                 goto skip_excludes;
 778
 779         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 780                 rprintf(FINFO, "skipping directory %s\n", thisname);
 781                 return NULL;
 782         }
 783
 784         /* We only care about directories because we need to avoid recursing
 785          * into a mount-point directory, not to avoid copying a symlinked
 786          * file if -L (or similar) was specified. */
 787         if (one_file_system && st.st_dev != filesystem_dev
 788             && S_ISDIR(st.st_mode))
 789                 flags |= FLAG_MOUNT_POINT;
 790
 791         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 792                 return NULL;
 793
 794         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 795                 return NULL;
 796
 797 skip_excludes:
 798
 799         if (verbose > 2) {
 800                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 801                         who_am_i(), thisname, exclude_level);
 802         }
 803
 804         if ((basename = strrchr(thisname, '/')) != NULL) {
 805                 dirname_len = ++basename - thisname; /* counts future '\0' */
 806                 if (lastdir_len == dirname_len - 1
 807                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 808                         dirname = lastdir;
 809                         dirname_len = 0; /* indicates no copy is needed */
 810                 } else
 811                         dirname = thisname;
 812         } else {
 813                 basename = thisname;
 814                 dirname = NULL;
 815                 dirname_len = 0;
 816         }
 817         basename_len = strlen(basename) + 1; /* count the '\0' */
 818
 819 #if SUPPORT_LINKS
 820         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 821 #else
 822         linkname_len = 0;
 823 #endif
 824
 825         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 826
 827         alloc_len = file_struct_len + dirname_len + basename_len
 828             + linkname_len + sum_len;
 829         if (flist) {
 830                 bp = pool_alloc(flist->file_pool, alloc_len,
 831                     "receive_file_entry");
 832         } else {
 833                 if (!(bp = new_array(char, alloc_len)))
 834                         out_of_memory("receive_file_entry");
 835         }
 836
 837         file = (struct file_struct *)bp;
 838         memset(bp, 0, file_struct_len);
 839         bp += file_struct_len;
 840
 841         file->flags = flags;
 842         file->modtime = st.st_mtime;
 843         file->length = st.st_size;
 844         file->mode = st.st_mode;
 845         file->uid = st.st_uid;
 846         file->gid = st.st_gid;
 847
 848 #if SUPPORT_HARD_LINKS
 849         if (flist && flist->hlink_pool) {
 850                 if (protocol_version < 28) {
 851                         if (S_ISREG(st.st_mode))
 852                                 file->link_u.idev = pool_talloc(
 853                                     flist->hlink_pool, struct idev, 1,
 854                                     "inode_table");
 855                 } else {
 856                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 857                                 file->link_u.idev = pool_talloc(
 858                                     flist->hlink_pool, struct idev, 1,
 859                                     "inode_table");
 860                 }
 861         }
 862         if (file->link_u.idev) {
 863                 file->F_DEV = st.st_dev;
 864                 file->F_INODE = st.st_ino;
 865         }
 866 #endif
 867
 868         if (dirname_len) {
 869                 file->dirname = lastdir = bp;
 870                 lastdir_len = dirname_len - 1;
 871                 memcpy(bp, dirname, dirname_len - 1);
 872                 bp += dirname_len;
 873                 bp[-1] = '\0';
 874         } else if (dirname)
 875                 file->dirname = dirname;
 876
 877         file->basename = bp;
 878         memcpy(bp, basename, basename_len);
 879         bp += basename_len;
 880
 881 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 882         if (preserve_devices && IS_DEVICE(st.st_mode))
 883                 file->u.rdev = st.st_rdev;
 884 #endif
 885
 886 #if SUPPORT_LINKS
 887         if (linkname_len) {
 888                 file->u.link = bp;
 889                 memcpy(bp, linkname, linkname_len);
 890                 bp += linkname_len;
 891         }
 892 #endif
 893
 894         if (sum_len) {
 895                 file->u.sum = bp;
 896                 file_checksum(thisname, bp, st.st_size);
 897                 /*bp += sum_len;*/
 898         }
 899
 900         file->basedir = flist_dir;
 901
 902         if (!S_ISDIR(st.st_mode))
 903                 stats.total_size += st.st_size;
 904
 905         return file;
 906 }
 907
 908
 909 void send_file_name(int f, struct file_list *flist, char *fname,
 910                     int recursive, unsigned short base_flags)
 911 {
 912         struct file_struct *file;
 913         char fbuf[MAXPATHLEN];
 914         extern int delete_excluded;
 915
 916         /* f is set to -1 when calculating deletion file list */
 917         file = make_file(fname, flist,
 918             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 919
 920         if (!file)
 921                 return;
 922
 923         maybe_emit_filelist_progress(flist);
 924
 925         flist_expand(flist);
 926
 927         if (write_batch)
 928                 file->flags |= FLAG_TOP_DIR;
 929
 930         if (file->basename[0]) {
 931                 flist->files[flist->count++] = file;
 932                 send_file_entry(file, f, base_flags);
 933         }
 934
 935         if (recursive && S_ISDIR(file->mode)
 936             && !(file->flags & FLAG_MOUNT_POINT)) {
 937                 struct exclude_struct **last_exclude_list = local_exclude_list;
 938                 send_directory(f, flist, f_name_to(file, fbuf));
 939                 local_exclude_list = last_exclude_list;
 940                 return;
 941         }
 942 }
 943
 944
 945 static void send_directory(int f, struct file_list *flist, char *dir)
 946 {
 947         DIR *d;
 948         struct dirent *di;
 949         char fname[MAXPATHLEN];
 950         unsigned int offset;
 951         char *p;
 952
 953         d = opendir(dir);
 954         if (!d) {
 955                 io_error |= IOERR_GENERAL;
 956                 rprintf(FERROR, "opendir %s failed: %s\n",
 957                         full_fname(dir), strerror(errno));
 958                 return;
 959         }
 960
 961         offset = strlcpy(fname, dir, MAXPATHLEN);
 962         p = fname + offset;
 963         if (offset >= MAXPATHLEN || p[-1] != '/') {
 964                 if (offset >= MAXPATHLEN - 1) {
 965                         io_error |= IOERR_GENERAL;
 966                         rprintf(FERROR, "skipping long-named directory: %s\n",
 967                                 full_fname(fname));
 968                         closedir(d);
 969                         return;
 970                 }
 971                 *p++ = '/';
 972                 offset++;
 973         }
 974
 975         local_exclude_list = NULL;
 976
 977         if (cvs_exclude) {
 978                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 979                     < MAXPATHLEN - offset)
 980                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 981                 else {
 982                         io_error |= IOERR_GENERAL;
 983                         rprintf(FINFO,
 984                                 "cannot cvs-exclude in long-named directory %s\n",
 985                                 full_fname(fname));
 986                 }
 987         }
 988
 989         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 990                 char *dname = d_name(di);
 991                 if (dname[0] == '.' && (dname[1] == '\0'
 992                     || (dname[1] == '.' && dname[2] == '\0')))
 993                         continue;
 994                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 995                         send_file_name(f, flist, fname, recurse, 0);
 996                 else {
 997                         io_error |= IOERR_GENERAL;
 998                         rprintf(FINFO,
 999                                 "cannot send long-named file %s\n",
1000                                 full_fname(fname));
1001                 }
1002         }
1003         if (errno) {
1004                 io_error |= IOERR_GENERAL;
1005                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1006                         dir, errno, strerror(errno));
1007         }
1008
1009         if (local_exclude_list)
1010                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1011
1012         closedir(d);
1013 }
1014
1015
1016 /**
1017  * The delete_files() function in receiver.c sets f to -1 so that we just
1018  * construct the file list in memory without sending it over the wire.  It
1019  * also has the side-effect of ignoring user-excludes if delete_excluded
1020  * is set (so that the delete list includes user-excluded files).
1021  **/
1022 struct file_list *send_file_list(int f, int argc, char *argv[])
1023 {
1024         int l;
1025         STRUCT_STAT st;
1026         char *p, *dir, olddir[sizeof curr_dir];
1027         char lastpath[MAXPATHLEN] = "";
1028         struct file_list *flist;
1029         int64 start_write;
1030         int use_ff_fd = 0;
1031
1032         if (show_filelist_p() && f != -1)
1033                 start_filelist_progress("building file list");
1034
1035         start_write = stats.total_written;
1036
1037         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1038             "send_file_list");
1039
1040         if (f != -1) {
1041                 io_start_buffering_out(f);
1042                 if (filesfrom_fd >= 0) {
1043                         if (argv[0] && !push_dir(argv[0])) {
1044                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1045                                         full_fname(argv[0]), strerror(errno));
1046                                 exit_cleanup(RERR_FILESELECT);
1047                         }
1048                         use_ff_fd = 1;
1049                 }
1050         }
1051
1052         while (1) {
1053                 char fname2[MAXPATHLEN];
1054                 char *fname = fname2;
1055
1056                 if (use_ff_fd) {
1057                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1058                                 break;
1059                         sanitize_path(fname, NULL);
1060                 } else {
1061                         if (argc-- == 0)
1062                                 break;
1063                         strlcpy(fname, *argv++, MAXPATHLEN);
1064                         if (sanitize_paths)
1065                                 sanitize_path(fname, NULL);
1066                 }
1067
1068                 l = strlen(fname);
1069                 if (fname[l - 1] == '/') {
1070                         if (l == 2 && fname[0] == '.') {
1071                                 /* Turn "./" into just "." rather than "./." */
1072                                 fname[1] = '\0';
1073                         } else if (l < MAXPATHLEN) {
1074                                 fname[l++] = '.';
1075                                 fname[l] = '\0';
1076                         }
1077                 }
1078
1079                 if (link_stat(fname, &st) != 0) {
1080                         if (f != -1) {
1081                                 io_error |= IOERR_GENERAL;
1082                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1083                                         full_fname(fname), strerror(errno));
1084                         }
1085                         continue;
1086                 }
1087
1088                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1089                         rprintf(FINFO, "skipping directory %s\n", fname);
1090                         continue;
1091                 }
1092
1093                 dir = NULL;
1094                 olddir[0] = '\0';
1095
1096                 if (!relative_paths) {
1097                         p = strrchr(fname, '/');
1098                         if (p) {
1099                                 *p = 0;
1100                                 if (p == fname)
1101                                         dir = "/";
1102                                 else
1103                                         dir = fname;
1104                                 fname = p + 1;
1105                         }
1106                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1107                         /* this ensures we send the intermediate directories,
1108                            thus getting their permissions right */
1109                         char *lp = lastpath, *fn = fname, *slash = fname;
1110                         *p = 0;
1111                         /* Skip any initial directories in our path that we
1112                          * have in common with lastpath. */
1113                         while (*fn && *lp == *fn) {
1114                                 if (*fn == '/')
1115                                         slash = fn;
1116                                 lp++, fn++;
1117                         }
1118                         *p = '/';
1119                         if (fn != p || (*lp && *lp != '/')) {
1120                                 int copy_links_saved = copy_links;
1121                                 int recurse_saved = recurse;
1122                                 copy_links = copy_unsafe_links;
1123                                 /* set recurse to 1 to prevent make_file
1124                                  * from ignoring directory, but still
1125                                  * turn off the recursive parameter to
1126                                  * send_file_name */
1127                                 recurse = 1;
1128                                 while ((slash = strchr(slash+1, '/')) != 0) {
1129                                         *slash = 0;
1130                                         send_file_name(f, flist, fname, 0, 0);
1131                                         *slash = '/';
1132                                 }
1133                                 copy_links = copy_links_saved;
1134                                 recurse = recurse_saved;
1135                                 *p = 0;
1136                                 strlcpy(lastpath, fname, sizeof lastpath);
1137                                 *p = '/';
1138                         }
1139                 }
1140
1141                 if (!*fname)
1142                         fname = ".";
1143
1144                 if (dir && *dir) {
1145                         static char *lastdir;
1146                         static int lastdir_len;
1147
1148                         strcpy(olddir, curr_dir); /* can't overflow */
1149
1150                         if (!push_dir(dir)) {
1151                                 io_error |= IOERR_GENERAL;
1152                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1153                                         full_fname(dir), strerror(errno));
1154                                 continue;
1155                         }
1156
1157                         if (lastdir && strcmp(lastdir, dir) == 0) {
1158                                 flist_dir = lastdir;
1159                                 flist_dir_len = lastdir_len;
1160                         } else {
1161                                 flist_dir = lastdir = strdup(dir);
1162                                 flist_dir_len = lastdir_len = strlen(dir);
1163                         }
1164                 }
1165
1166                 if (one_file_system)
1167                         set_filesystem(fname);
1168
1169                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1170
1171                 if (olddir[0]) {
1172                         flist_dir = NULL;
1173                         flist_dir_len = 0;
1174                         if (!pop_dir(olddir)) {
1175                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1176                                         full_fname(dir), strerror(errno));
1177                                 exit_cleanup(RERR_FILESELECT);
1178                         }
1179                 }
1180         }
1181
1182         if (f != -1) {
1183                 send_file_entry(NULL, f, 0);
1184
1185                 if (show_filelist_p())
1186                         finish_filelist_progress(flist);
1187         }
1188
1189         if (flist->hlink_pool) {
1190                 pool_destroy(flist->hlink_pool);
1191                 flist->hlink_pool = NULL;
1192         }
1193
1194         clean_flist(flist, 0, 0);
1195
1196         if (f != -1) {
1197                 /* Now send the uid/gid list. This was introduced in
1198                  * protocol version 15 */
1199                 send_uid_list(f);
1200
1201                 /* send the io_error flag */
1202                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1203
1204                 io_end_buffering();
1205                 stats.flist_size = stats.total_written - start_write;
1206                 stats.num_files = flist->count;
1207                 if (write_batch)
1208                         write_batch_flist_info(flist->count, flist->files);
1209         }
1210
1211         if (verbose > 3)
1212                 output_flist(flist);
1213
1214         if (verbose > 2)
1215                 rprintf(FINFO, "send_file_list done\n");
1216
1217         return flist;
1218 }
1219
1220
1221 struct file_list *recv_file_list(int f)
1222 {
1223         struct file_list *flist;
1224         unsigned short flags;
1225         int64 start_read;
1226         extern int list_only;
1227
1228         if (show_filelist_p())
1229                 start_filelist_progress("receiving file list");
1230
1231         start_read = stats.total_read;
1232
1233         flist = flist_new(WITH_HLINK, "recv_file_list");
1234
1235         flist->count = 0;
1236         flist->malloced = 1000;
1237         flist->files = new_array(struct file_struct *, flist->malloced);
1238         if (!flist->files)
1239                 goto oom;
1240
1241
1242         while ((flags = read_byte(f)) != 0) {
1243                 int i = flist->count;
1244
1245                 flist_expand(flist);
1246
1247                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1248                         flags |= read_byte(f) << 8;
1249                 receive_file_entry(&flist->files[i], flags, flist, f);
1250
1251                 if (S_ISREG(flist->files[i]->mode))
1252                         stats.total_size += flist->files[i]->length;
1253
1254                 flist->count++;
1255
1256                 maybe_emit_filelist_progress(flist);
1257
1258                 if (verbose > 2) {
1259                         rprintf(FINFO, "recv_file_name(%s)\n",
1260                                 f_name(flist->files[i]));
1261                 }
1262         }
1263         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1264
1265         if (verbose > 2)
1266                 rprintf(FINFO, "received %d names\n", flist->count);
1267
1268         if (show_filelist_p())
1269                 finish_filelist_progress(flist);
1270
1271         clean_flist(flist, relative_paths, 1);
1272
1273         if (f != -1) {
1274                 /* Now send the uid/gid list. This was introduced in
1275                  * protocol version 15 */
1276                 recv_uid_list(f, flist);
1277
1278                 if (!read_batch) {
1279                         /* Recv the io_error flag */
1280                         if (lp_ignore_errors(module_id) || ignore_errors)
1281                                 read_int(f);
1282                         else
1283                                 io_error |= read_int(f);
1284                 }
1285         }
1286
1287         if (verbose > 3)
1288                 output_flist(flist);
1289
1290         if (list_only) {
1291                 int i;
1292                 for (i = 0; i < flist->count; i++)
1293                         list_file_entry(flist->files[i]);
1294         }
1295
1296         if (verbose > 2)
1297                 rprintf(FINFO, "recv_file_list done\n");
1298
1299         stats.flist_size = stats.total_read - start_read;
1300         stats.num_files = flist->count;
1301
1302         return flist;
1303
1304 oom:
1305         out_of_memory("recv_file_list");
1306         return NULL;            /* not reached */
1307 }
1308
1309
1310 int file_compare(struct file_struct **file1, struct file_struct **file2)
1311 {
1312         struct file_struct *f1 = *file1;
1313         struct file_struct *f2 = *file2;
1314
1315         if (!f1->basename && !f2->basename)
1316                 return 0;
1317         if (!f1->basename)
1318                 return -1;
1319         if (!f2->basename)
1320                 return 1;
1321         if (f1->dirname == f2->dirname)
1322                 return u_strcmp(f1->basename, f2->basename);
1323         return f_name_cmp(f1, f2);
1324 }
1325
1326
1327 int flist_find(struct file_list *flist, struct file_struct *f)
1328 {
1329         int low = 0, high = flist->count - 1;
1330
1331         while (high >= 0 && !flist->files[high]->basename) high--;
1332
1333         if (high < 0)
1334                 return -1;
1335
1336         while (low != high) {
1337                 int mid = (low + high) / 2;
1338                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1339                 if (ret == 0)
1340                         return flist_up(flist, mid);
1341                 if (ret > 0)
1342                         high = mid;
1343                 else
1344                         low = mid + 1;
1345         }
1346
1347         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1348                 return flist_up(flist, low);
1349         return -1;
1350 }
1351
1352 /*
1353  * Free up any resources a file_struct has allocated
1354  * and clear the file.
1355  */
1356 void clear_file(int i, struct file_list *flist)
1357 {
1358         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1359                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1360         memset(flist->files[i], 0, file_struct_len);
1361 }
1362
1363
1364 /*
1365  * allocate a new file list
1366  */
1367 struct file_list *flist_new(int with_hlink, char *msg)
1368 {
1369         struct file_list *flist;
1370
1371         flist = new(struct file_list);
1372         if (!flist)
1373                 out_of_memory(msg);
1374
1375         memset(flist, 0, sizeof (struct file_list));
1376
1377         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1378             out_of_memory, POOL_INTERN)))
1379                 out_of_memory(msg);
1380
1381 #if SUPPORT_HARD_LINKS
1382         if (with_hlink && preserve_hard_links) {
1383                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1384                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1385                         out_of_memory(msg);
1386         }
1387 #endif
1388
1389         return flist;
1390 }
1391
1392 /*
1393  * free up all elements in a flist
1394  */
1395 void flist_free(struct file_list *flist)
1396 {
1397         pool_destroy(flist->file_pool);
1398         pool_destroy(flist->hlink_pool);
1399         free(flist->files);
1400         free(flist);
1401 }
1402
1403
1404 /*
1405  * This routine ensures we don't have any duplicate names in our file list.
1406  * duplicate names can cause corruption because of the pipelining
1407  */
1408 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1409 {
1410         int i, prev_i = 0;
1411
1412         if (!flist || flist->count == 0)
1413                 return;
1414
1415         qsort(flist->files, flist->count,
1416             sizeof flist->files[0], (int (*)()) file_compare);
1417
1418         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1419                 if (flist->files[i]->basename) {
1420                         prev_i = i;
1421                         break;
1422                 }
1423         }
1424         while (++i < flist->count) {
1425                 if (!flist->files[i]->basename)
1426                         continue;
1427                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1428                         if (verbose > 1 && !am_server) {
1429                                 rprintf(FINFO,
1430                                         "removing duplicate name %s from file list %d\n",
1431                                         f_name(flist->files[i]), i);
1432                         }
1433                         /* Make sure that if we unduplicate '.', that we don't
1434                          * lose track of a user-specified starting point (or
1435                          * else deletions will mysteriously fail with -R). */
1436                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1437                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1438
1439                         clear_file(i, flist);
1440                 } else
1441                         prev_i = i;
1442         }
1443
1444         if (strip_root) {
1445                 /* we need to strip off the root directory in the case
1446                    of relative paths, but this must be done _after_
1447                    the sorting phase */
1448                 for (i = 0; i < flist->count; i++) {
1449                         if (flist->files[i]->dirname &&
1450                             flist->files[i]->dirname[0] == '/') {
1451                                 memmove(&flist->files[i]->dirname[0],
1452                                         &flist->files[i]->dirname[1],
1453                                         strlen(flist->files[i]->dirname));
1454                         }
1455
1456                         if (flist->files[i]->dirname &&
1457                             !flist->files[i]->dirname[0]) {
1458                                 flist->files[i]->dirname = NULL;
1459                         }
1460                 }
1461         }
1462 }
1463
1464 static void output_flist(struct file_list *flist)
1465 {
1466         char uidbuf[16], gidbuf[16];
1467         struct file_struct *file;
1468         int i;
1469
1470         for (i = 0; i < flist->count; i++) {
1471                 file = flist->files[i];
1472                 if (am_root && preserve_uid)
1473                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1474                 else
1475                         *uidbuf = '\0';
1476                 if (preserve_gid && file->gid != GID_NONE)
1477                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1478                 else
1479                         *gidbuf = '\0';
1480                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1481                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1482                         NS(file->basename), (int) file->mode,
1483                         (double) file->length, uidbuf, gidbuf);
1484         }
1485 }
1486
1487
1488 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1489
1490 /* Compare the names of two file_struct entities, just like strcmp()
1491  * would do if it were operating on the joined strings.  We assume
1492  * that there are no 0-length strings.
1493  */
1494 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1495 {
1496         int dif;
1497         const uchar *c1, *c2;
1498         enum fnc_state state1, state2;
1499
1500         if (!f1 || !f1->basename) {
1501                 if (!f2 || !f2->basename)
1502                         return 0;
1503                 return -1;
1504         }
1505         if (!f2 || !f2->basename)
1506                 return 1;
1507
1508         if (!(c1 = (uchar*)f1->dirname)) {
1509                 state1 = fnc_BASE;
1510                 c1 = (uchar*)f1->basename;
1511         } else
1512                 state1 = fnc_DIR;
1513         if (!(c2 = (uchar*)f2->dirname)) {
1514                 state2 = fnc_BASE;
1515                 c2 = (uchar*)f2->basename;
1516         } else
1517                 state2 = fnc_DIR;
1518
1519         while (1) {
1520                 if ((dif = (int)*c1 - (int)*c2) != 0)
1521                         break;
1522                 if (!*++c1) {
1523                         switch (state1) {
1524                         case fnc_DIR:
1525                                 state1 = fnc_SLASH;
1526                                 c1 = (uchar*)"/";
1527                                 break;
1528                         case fnc_SLASH:
1529                                 state1 = fnc_BASE;
1530                                 c1 = (uchar*)f1->basename;
1531                                 break;
1532                         case fnc_BASE:
1533                                 break;
1534                         }
1535                 }
1536                 if (!*++c2) {
1537                         switch (state2) {
1538                         case fnc_DIR:
1539                                 state2 = fnc_SLASH;
1540                                 c2 = (uchar*)"/";
1541                                 break;
1542                         case fnc_SLASH:
1543                                 state2 = fnc_BASE;
1544                                 c2 = (uchar*)f2->basename;
1545                                 break;
1546                         case fnc_BASE:
1547                                 if (!*c1)
1548                                         return 0;
1549                                 break;
1550                         }
1551                 }
1552         }
1553
1554         return dif;
1555 }
1556
1557
1558 /* Return a copy of the full filename of a flist entry, using the indicated
1559  * buffer.  No size-checking is done because we checked the size when creating
1560  * the file_struct entry.
1561  */
1562 char *f_name_to(struct file_struct *f, char *fbuf)
1563 {
1564         if (!f || !f->basename)
1565                 return NULL;
1566
1567         if (f->dirname) {
1568                 int len = strlen(f->dirname);
1569                 memcpy(fbuf, f->dirname, len);
1570                 fbuf[len] = '/';
1571                 strcpy(fbuf + len + 1, f->basename);
1572         } else
1573                 strcpy(fbuf, f->basename);
1574         return fbuf;
1575 }
1576
1577
1578 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1579  */
1580 char *f_name(struct file_struct *f)
1581 {
1582         static char names[5][MAXPATHLEN];
1583         static unsigned int n;
1584
1585         n = (n + 1) % (sizeof names / sizeof names[0]);
1586
1587         return f_name_to(f, names[n]);
1588 }