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 am_sender;
  38 extern int always_checksum;
  39 extern int module_id;
  40 extern int ignore_errors;
  41 extern int numeric_ids;
  42
  43 extern int cvs_exclude;
  44
  45 extern int recurse;
  46 extern char curr_dir[MAXPATHLEN];
  47 extern char *files_from;
  48 extern int filesfrom_fd;
  49
  50 extern int one_file_system;
  51 extern int keep_dirlinks;
  52 extern int preserve_links;
  53 extern int preserve_hard_links;
  54 extern int preserve_perms;
  55 extern int preserve_devices;
  56 extern int preserve_uid;
  57 extern int preserve_gid;
  58 extern int relative_paths;
  59 extern int implied_dirs;
  60 extern int copy_links;
  61 extern int copy_unsafe_links;
  62 extern int protocol_version;
  63 extern int sanitize_paths;
  64 extern int delete_excluded;
  65 extern int orig_umask;
  66 extern int list_only;
  67
  68 extern struct exclude_list_struct exclude_list;
  69 extern struct exclude_list_struct server_exclude_list;
  70 extern struct exclude_list_struct local_exclude_list;
  71
  72 int io_error;
  73
  74 static char empty_sum[MD4_SUM_LENGTH];
  75 static unsigned int file_struct_len;
  76 static struct file_list *received_flist;
  77
  78 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  79 static void output_flist(struct file_list *flist);
  80
  81 void init_flist(void)
  82 {
  83         struct file_struct f;
  84
  85         /* Figure out how big the file_struct is without trailing padding */
  86         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
  87 }
  88
  89
  90 static int show_filelist_p(void)
  91 {
  92         return verbose && (recurse || files_from) && !am_server;
  93 }
  94
  95 static void start_filelist_progress(char *kind)
  96 {
  97         rprintf(FINFO, "%s ... ", kind);
  98         if (verbose > 1 || do_progress)
  99                 rprintf(FINFO, "\n");
 100         rflush(FINFO);
 101 }
 102
 103
 104 static void emit_filelist_progress(const struct file_list *flist)
 105 {
 106         rprintf(FINFO, " %d files...\r", flist->count);
 107 }
 108
 109
 110 static void maybe_emit_filelist_progress(const struct file_list *flist)
 111 {
 112         if (do_progress && show_filelist_p() && (flist->count % 100) == 0)
 113                 emit_filelist_progress(flist);
 114 }
 115
 116
 117 static void finish_filelist_progress(const struct file_list *flist)
 118 {
 119         if (do_progress) {
 120                 /* This overwrites the progress line */
 121                 rprintf(FINFO, "%d file%sto consider\n",
 122                         flist->count, flist->count == 1 ? " " : "s ");
 123         } else
 124                 rprintf(FINFO, "done\n");
 125 }
 126
 127 void show_flist_stats(void)
 128 {
 129         /* Nothing yet */
 130 }
 131
 132
 133 static void list_file_entry(struct file_struct *f)
 134 {
 135         char perms[11];
 136
 137         if (!f->basename) {
 138                 /* this can happen if duplicate names were removed */
 139                 return;
 140         }
 141
 142         permstring(perms, f->mode);
 143
 144 #if SUPPORT_LINKS
 145         if (preserve_links && S_ISLNK(f->mode)) {
 146                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 147                         perms,
 148                         (double)f->length, timestring(f->modtime),
 149                         f_name(f), f->u.link);
 150         } else
 151 #endif
 152         {
 153                 rprintf(FINFO, "%s %11.0f %s %s\n",
 154                         perms,
 155                         (double)f->length, timestring(f->modtime),
 156                         f_name(f));
 157         }
 158 }
 159
 160
 161 /**
 162  * Stat either a symlink or its referent, depending on the settings of
 163  * copy_links, copy_unsafe_links, etc.
 164  *
 165  * @retval -1 on error
 166  *
 167  * @retval 0 for success
 168  *
 169  * @post If @p path is a symlink, then @p linkbuf (of size @c
 170  * MAXPATHLEN) contains the symlink target.
 171  *
 172  * @post @p buffer contains information about the link or the
 173  * referrent as appropriate, if they exist.
 174  **/
 175 static int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 176 {
 177 #if SUPPORT_LINKS
 178         if (copy_links)
 179                 return do_stat(path, buffer);
 180         if (link_stat(path, buffer, 0) < 0)
 181                 return -1;
 182         if (S_ISLNK(buffer->st_mode)) {
 183                 int l = readlink((char *)path, linkbuf, MAXPATHLEN - 1);
 184                 if (l == -1)
 185                         return -1;
 186                 linkbuf[l] = 0;
 187                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 188                         if (verbose > 1) {
 189                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 190                                         path, linkbuf);
 191                         }
 192                         return do_stat(path, buffer);
 193                 }
 194         }
 195         return 0;
 196 #else
 197         return do_stat(path, buffer);
 198 #endif
 199 }
 200
 201 int link_stat(const char *path, STRUCT_STAT *buffer, int follow_dirlinks)
 202 {
 203 #if SUPPORT_LINKS
 204         if (copy_links)
 205                 return do_stat(path, buffer);
 206         if (do_lstat(path, buffer) < 0)
 207                 return -1;
 208         if (follow_dirlinks && S_ISLNK(buffer->st_mode)) {
 209                 STRUCT_STAT st;
 210                 if (do_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
 211                         *buffer = st;
 212         }
 213         return 0;
 214 #else
 215         return do_stat(path, buffer);
 216 #endif
 217 }
 218
 219 /*
 220  * This function is used to check if a file should be included/excluded
 221  * from the list of files based on its name and type etc.  The value of
 222  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 223  */
 224 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 225 {
 226         int rc;
 227
 228 #if 0 /* This currently never happens, so avoid a useless compare. */
 229         if (exclude_level == NO_EXCLUDES)
 230                 return 0;
 231 #endif
 232         if (fname) {
 233                 /* never exclude '.', even if somebody does --exclude '*' */
 234                 if (fname[0] == '.' && !fname[1])
 235                         return 0;
 236                 /* Handle the -R version of the '.' dir. */
 237                 if (fname[0] == '/') {
 238                         int len = strlen(fname);
 239                         if (fname[len-1] == '.' && fname[len-2] == '/')
 240                                 return 0;
 241                 }
 242         }
 243         if (server_exclude_list.head
 244             && check_exclude(&server_exclude_list, fname, is_dir) < 0)
 245                 return 1;
 246         if (exclude_level != ALL_EXCLUDES)
 247                 return 0;
 248         if (exclude_list.head
 249             && (rc = check_exclude(&exclude_list, fname, is_dir)) != 0)
 250                 return rc < 0;
 251         if (local_exclude_list.head
 252             && check_exclude(&local_exclude_list, fname, is_dir) < 0)
 253                 return 1;
 254         return 0;
 255 }
 256
 257 /* used by the one_file_system code */
 258 static dev_t filesystem_dev;
 259
 260 static void set_filesystem(char *fname)
 261 {
 262         STRUCT_STAT st;
 263         if (do_stat(fname, &st) != 0)
 264                 return;
 265         filesystem_dev = st.st_dev;
 266 }
 267
 268
 269 static int to_wire_mode(mode_t mode)
 270 {
 271 #if SUPPORT_LINKS
 272         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 273                 return (mode & ~(_S_IFMT)) | 0120000;
 274 #endif
 275         return (int)mode;
 276 }
 277
 278 static mode_t from_wire_mode(int mode)
 279 {
 280         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 281                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 282         return (mode_t)mode;
 283 }
 284
 285
 286 static void send_directory(int f, struct file_list *flist, char *dir);
 287
 288 static char *flist_dir;
 289 static int flist_dir_len;
 290
 291
 292 /**
 293  * Make sure @p flist is big enough to hold at least @p flist->count
 294  * entries.
 295  **/
 296 void flist_expand(struct file_list *flist)
 297 {
 298         struct file_struct **new_ptr;
 299
 300         if (flist->count < flist->malloced)
 301                 return;
 302
 303         if (flist->malloced < FLIST_START)
 304                 flist->malloced = FLIST_START;
 305         else if (flist->malloced >= FLIST_LINEAR)
 306                 flist->malloced += FLIST_LINEAR;
 307         else
 308                 flist->malloced *= 2;
 309
 310         /*
 311          * In case count jumped or we are starting the list
 312          * with a known size just set it.
 313          */
 314         if (flist->malloced < flist->count)
 315                 flist->malloced = flist->count;
 316
 317         new_ptr = realloc_array(flist->files, struct file_struct *,
 318                                 flist->malloced);
 319
 320         if (verbose >= 2) {
 321                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 322                     who_am_i(),
 323                     (double)sizeof flist->files[0] * flist->malloced,
 324                     (new_ptr == flist->files) ? " not" : "");
 325         }
 326
 327         flist->files = new_ptr;
 328
 329         if (!flist->files)
 330                 out_of_memory("flist_expand");
 331 }
 332
 333 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 334 {
 335         unsigned short flags;
 336         static time_t modtime;
 337         static mode_t mode;
 338         static uint64 dev;
 339         static dev_t rdev;
 340         static uint32 rdev_major;
 341         static uid_t uid;
 342         static gid_t gid;
 343         static char lastname[MAXPATHLEN];
 344         char fname[MAXPATHLEN];
 345         int l1, l2;
 346
 347         if (f == -1)
 348                 return;
 349
 350         if (!file) {
 351                 write_byte(f, 0);
 352                 modtime = 0, mode = 0;
 353                 dev = 0, rdev = makedev(0, 0);
 354                 rdev_major = 0;
 355                 uid = 0, gid = 0;
 356                 *lastname = '\0';
 357                 return;
 358         }
 359
 360         io_write_phase = "send_file_entry";
 361
 362         f_name_to(file, fname);
 363
 364         flags = base_flags;
 365
 366         if (file->mode == mode)
 367                 flags |= XMIT_SAME_MODE;
 368         else
 369                 mode = file->mode;
 370         if (preserve_devices) {
 371                 if (protocol_version < 28) {
 372                         if (IS_DEVICE(mode)) {
 373                                 if (file->u.rdev == rdev)
 374                                         flags |= XMIT_SAME_RDEV_pre28;
 375                                 else
 376                                         rdev = file->u.rdev;
 377                         } else
 378                                 rdev = makedev(0, 0);
 379                 } else if (IS_DEVICE(mode)) {
 380                         rdev = file->u.rdev;
 381                         if ((uint32)major(rdev) == rdev_major)
 382                                 flags |= XMIT_SAME_RDEV_MAJOR;
 383                         else
 384                                 rdev_major = major(rdev);
 385                         if ((uint32)minor(rdev) <= 0xFFu)
 386                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 387                 }
 388         }
 389         if (file->uid == uid)
 390                 flags |= XMIT_SAME_UID;
 391         else
 392                 uid = file->uid;
 393         if (file->gid == gid)
 394                 flags |= XMIT_SAME_GID;
 395         else
 396                 gid = file->gid;
 397         if (file->modtime == modtime)
 398                 flags |= XMIT_SAME_TIME;
 399         else
 400                 modtime = file->modtime;
 401
 402 #if SUPPORT_HARD_LINKS
 403         if (file->link_u.idev) {
 404                 if (file->F_DEV == dev) {
 405                         if (protocol_version >= 28)
 406                                 flags |= XMIT_SAME_DEV;
 407                 } else
 408                         dev = file->F_DEV;
 409                 flags |= XMIT_HAS_IDEV_DATA;
 410         }
 411 #endif
 412
 413         for (l1 = 0;
 414             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 415             l1++) {}
 416         l2 = strlen(fname+l1);
 417
 418         if (l1 > 0)
 419                 flags |= XMIT_SAME_NAME;
 420         if (l2 > 255)
 421                 flags |= XMIT_LONG_NAME;
 422
 423         /* We must make sure we don't send a zero flag byte or the
 424          * other end will terminate the flist transfer.  Note that
 425          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 426          * it's harmless way to add a bit to the first flag byte. */
 427         if (protocol_version >= 28) {
 428                 if (!flags && !S_ISDIR(mode))
 429                         flags |= XMIT_TOP_DIR;
 430                 if ((flags & 0xFF00) || !flags) {
 431                         flags |= XMIT_EXTENDED_FLAGS;
 432                         write_byte(f, flags);
 433                         write_byte(f, flags >> 8);
 434                 } else
 435                         write_byte(f, flags);
 436         } else {
 437                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 438                         flags |= XMIT_TOP_DIR;
 439                 if (!(flags & 0xFF))
 440                         flags |= XMIT_LONG_NAME;
 441                 write_byte(f, flags);
 442         }
 443         if (flags & XMIT_SAME_NAME)
 444                 write_byte(f, l1);
 445         if (flags & XMIT_LONG_NAME)
 446                 write_int(f, l2);
 447         else
 448                 write_byte(f, l2);
 449         write_buf(f, fname + l1, l2);
 450
 451         write_longint(f, file->length);
 452         if (!(flags & XMIT_SAME_TIME))
 453                 write_int(f, modtime);
 454         if (!(flags & XMIT_SAME_MODE))
 455                 write_int(f, to_wire_mode(mode));
 456         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 457                 if (!numeric_ids)
 458                         add_uid(uid);
 459                 write_int(f, uid);
 460         }
 461         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 462                 if (!numeric_ids)
 463                         add_gid(gid);
 464                 write_int(f, gid);
 465         }
 466         if (preserve_devices && IS_DEVICE(mode)) {
 467                 if (protocol_version < 28) {
 468                         if (!(flags & XMIT_SAME_RDEV_pre28))
 469                                 write_int(f, (int)rdev);
 470                 } else {
 471                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 472                                 write_int(f, major(rdev));
 473                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 474                                 write_byte(f, minor(rdev));
 475                         else
 476                                 write_int(f, minor(rdev));
 477                 }
 478         }
 479
 480 #if SUPPORT_LINKS
 481         if (preserve_links && S_ISLNK(mode)) {
 482                 int len = strlen(file->u.link);
 483                 write_int(f, len);
 484                 write_buf(f, file->u.link, len);
 485         }
 486 #endif
 487
 488 #if SUPPORT_HARD_LINKS
 489         if (flags & XMIT_HAS_IDEV_DATA) {
 490                 if (protocol_version < 26) {
 491                         /* 32-bit dev_t and ino_t */
 492                         write_int(f, dev);
 493                         write_int(f, file->F_INODE);
 494                 } else {
 495                         /* 64-bit dev_t and ino_t */
 496                         if (!(flags & XMIT_SAME_DEV))
 497                                 write_longint(f, dev);
 498                         write_longint(f, file->F_INODE);
 499                 }
 500         }
 501 #endif
 502
 503         if (always_checksum) {
 504                 char *sum;
 505                 if (S_ISREG(mode))
 506                         sum = file->u.sum;
 507                 else if (protocol_version < 28) {
 508                         /* Prior to 28, we sent a useless set of nulls. */
 509                         sum = empty_sum;
 510                 } else
 511                         sum = NULL;
 512                 if (sum) {
 513                         write_buf(f, sum,
 514                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 515                 }
 516         }
 517
 518         strlcpy(lastname, fname, MAXPATHLEN);
 519
 520         io_write_phase = "unknown";
 521 }
 522
 523
 524
 525 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 526                         struct file_list *flist, int f)
 527 {
 528         static time_t modtime;
 529         static mode_t mode;
 530         static uint64 dev;
 531         static dev_t rdev;
 532         static uint32 rdev_major;
 533         static uid_t uid;
 534         static gid_t gid;
 535         static char lastname[MAXPATHLEN], *lastdir;
 536         static int lastdir_depth, lastdir_len = -1;
 537         char thisname[MAXPATHLEN];
 538         unsigned int l1 = 0, l2 = 0;
 539         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 540         OFF_T file_length;
 541         char *basename, *dirname, *bp;
 542         struct file_struct *file;
 543
 544         if (!fptr) {
 545                 modtime = 0, mode = 0;
 546                 dev = 0, rdev = makedev(0, 0);
 547                 rdev_major = 0;
 548                 uid = 0, gid = 0;
 549                 *lastname = '\0';
 550                 lastdir_len = -1;
 551                 return;
 552         }
 553
 554         if (flags & XMIT_SAME_NAME)
 555                 l1 = read_byte(f);
 556
 557         if (flags & XMIT_LONG_NAME)
 558                 l2 = read_int(f);
 559         else
 560                 l2 = read_byte(f);
 561
 562         if (l2 >= MAXPATHLEN - l1) {
 563                 rprintf(FERROR,
 564                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 565                         flags, l1, l2, lastname);
 566                 overflow("receive_file_entry");
 567         }
 568
 569         strlcpy(thisname, lastname, l1 + 1);
 570         read_sbuf(f, &thisname[l1], l2);
 571         thisname[l1 + l2] = 0;
 572
 573         strlcpy(lastname, thisname, MAXPATHLEN);
 574
 575         clean_fname(thisname, 0);
 576
 577         if (sanitize_paths)
 578                 sanitize_path(thisname, thisname, "", 0);
 579
 580         if ((basename = strrchr(thisname, '/')) != NULL) {
 581                 dirname_len = ++basename - thisname; /* counts future '\0' */
 582                 if (lastdir_len == dirname_len - 1
 583                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 584                         dirname = lastdir;
 585                         dirname_len = 0; /* indicates no copy is needed */
 586                 } else
 587                         dirname = thisname;
 588         } else {
 589                 basename = thisname;
 590                 dirname = NULL;
 591                 dirname_len = 0;
 592         }
 593         basename_len = strlen(basename) + 1; /* count the '\0' */
 594
 595         file_length = read_longint(f);
 596         if (!(flags & XMIT_SAME_TIME))
 597                 modtime = (time_t)read_int(f);
 598         if (!(flags & XMIT_SAME_MODE))
 599                 mode = from_wire_mode(read_int(f));
 600
 601         if (preserve_uid && !(flags & XMIT_SAME_UID))
 602                 uid = (uid_t)read_int(f);
 603         if (preserve_gid && !(flags & XMIT_SAME_GID))
 604                 gid = (gid_t)read_int(f);
 605
 606         if (preserve_devices) {
 607                 if (protocol_version < 28) {
 608                         if (IS_DEVICE(mode)) {
 609                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 610                                         rdev = (dev_t)read_int(f);
 611                         } else
 612                                 rdev = makedev(0, 0);
 613                 } else if (IS_DEVICE(mode)) {
 614                         uint32 rdev_minor;
 615                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 616                                 rdev_major = read_int(f);
 617                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 618                                 rdev_minor = read_byte(f);
 619                         else
 620                                 rdev_minor = read_int(f);
 621                         rdev = makedev(rdev_major, rdev_minor);
 622                 }
 623         }
 624
 625 #if SUPPORT_LINKS
 626         if (preserve_links && S_ISLNK(mode)) {
 627                 linkname_len = read_int(f) + 1; /* count the '\0' */
 628                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 629                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 630                                 linkname_len - 1);
 631                         overflow("receive_file_entry");
 632                 }
 633         }
 634         else
 635 #endif
 636                 linkname_len = 0;
 637
 638         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 639
 640         alloc_len = file_struct_len + dirname_len + basename_len
 641                   + linkname_len + sum_len;
 642         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 643
 644         file = *fptr = (struct file_struct *)bp;
 645         memset(bp, 0, file_struct_len);
 646         bp += file_struct_len;
 647
 648         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 649         file->modtime = modtime;
 650         file->length = file_length;
 651         file->mode = mode;
 652         file->uid = uid;
 653         file->gid = gid;
 654
 655         if (dirname_len) {
 656                 file->dirname = lastdir = bp;
 657                 lastdir_len = dirname_len - 1;
 658                 memcpy(bp, dirname, dirname_len - 1);
 659                 bp += dirname_len;
 660                 bp[-1] = '\0';
 661                 if (sanitize_paths)
 662                         lastdir_depth = count_dir_elements(lastdir);
 663         } else if (dirname)
 664                 file->dirname = dirname;
 665
 666         file->basename = bp;
 667         memcpy(bp, basename, basename_len);
 668         bp += basename_len;
 669
 670         if (preserve_devices && IS_DEVICE(mode))
 671                 file->u.rdev = rdev;
 672
 673 #if SUPPORT_LINKS
 674         if (linkname_len) {
 675                 file->u.link = bp;
 676                 read_sbuf(f, bp, linkname_len - 1);
 677                 if (sanitize_paths)
 678                         sanitize_path(bp, bp, "", lastdir_depth);
 679                 bp += linkname_len;
 680         }
 681 #endif
 682
 683 #if SUPPORT_HARD_LINKS
 684         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 685                 flags |= XMIT_HAS_IDEV_DATA;
 686         if (flags & XMIT_HAS_IDEV_DATA) {
 687                 uint64 inode;
 688                 if (protocol_version < 26) {
 689                         dev = read_int(f);
 690                         inode = read_int(f);
 691                 } else {
 692                         if (!(flags & XMIT_SAME_DEV))
 693                                 dev = read_longint(f);
 694                         inode = read_longint(f);
 695                 }
 696                 if (flist->hlink_pool) {
 697                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 698                             struct idev, 1, "inode_table");
 699                         file->F_INODE = inode;
 700                         file->F_DEV = dev;
 701                 }
 702         }
 703 #endif
 704
 705         if (always_checksum) {
 706                 char *sum;
 707                 if (sum_len) {
 708                         file->u.sum = sum = bp;
 709                         /*bp += sum_len;*/
 710                 } else if (protocol_version < 28) {
 711                         /* Prior to 28, we get a useless set of nulls. */
 712                         sum = empty_sum;
 713                 } else
 714                         sum = NULL;
 715                 if (sum) {
 716                         read_buf(f, sum,
 717                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 718                 }
 719         }
 720
 721         if (!preserve_perms) {
 722                 /* set an appropriate set of permissions based on original
 723                  * permissions and umask. This emulates what GNU cp does */
 724                 file->mode &= ~orig_umask;
 725         }
 726 }
 727
 728
 729 /**
 730  * Create a file_struct for a named file by reading its stat()
 731  * information and performing extensive checks against global
 732  * options.
 733  *
 734  * @return the new file, or NULL if there was an error or this file
 735  * should be excluded.
 736  *
 737  * @todo There is a small optimization opportunity here to avoid
 738  * stat()ing the file in some circumstances, which has a certain cost.
 739  * We are called immediately after doing readdir(), and so we may
 740  * already know the d_type of the file.  We could for example avoid
 741  * statting directories if we're not recursing, but this is not a very
 742  * important case.  Some systems may not have d_type.
 743  **/
 744 struct file_struct *make_file(char *fname, struct file_list *flist,
 745                               int exclude_level)
 746 {
 747         static char *lastdir;
 748         static int lastdir_len = -1;
 749         struct file_struct *file;
 750         STRUCT_STAT st;
 751         char sum[SUM_LENGTH];
 752         char thisname[MAXPATHLEN];
 753         char linkname[MAXPATHLEN];
 754         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 755         char *basename, *dirname, *bp;
 756         unsigned short flags = 0;
 757
 758         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 759                 lastdir_len = -1;
 760
 761         if (strlcpy(thisname, fname, sizeof thisname)
 762             >= sizeof thisname - flist_dir_len) {
 763                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 764                 return NULL;
 765         }
 766         clean_fname(thisname, 0);
 767         if (sanitize_paths)
 768                 sanitize_path(thisname, thisname, "", 0);
 769
 770         memset(sum, 0, SUM_LENGTH);
 771
 772         if (readlink_stat(thisname, &st, linkname) != 0) {
 773                 int save_errno = errno;
 774                 /* See if file is excluded before reporting an error. */
 775                 if (exclude_level != NO_EXCLUDES
 776                     && check_exclude_file(thisname, 0, exclude_level))
 777                         return NULL;
 778                 if (save_errno == ENOENT) {
 779 #if SUPPORT_LINKS
 780                         /* Avoid "vanished" error if symlink points nowhere. */
 781                         if (copy_links && do_lstat(thisname, &st) == 0
 782                             && S_ISLNK(st.st_mode)) {
 783                                 io_error |= IOERR_GENERAL;
 784                                 rprintf(FERROR, "symlink has no referent: %s\n",
 785                                         full_fname(thisname));
 786                         } else
 787 #endif
 788                         {
 789                                 enum logcode c = am_daemon && protocol_version < 28
 790                                     ? FERROR : FINFO;
 791                                 io_error |= IOERR_VANISHED;
 792                                 rprintf(c, "file has vanished: %s\n",
 793                                         full_fname(thisname));
 794                         }
 795                 } else {
 796                         io_error |= IOERR_GENERAL;
 797                         rsyserr(FERROR, save_errno, "readlink %s failed",
 798                                 full_fname(thisname));
 799                 }
 800                 return NULL;
 801         }
 802
 803         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 804         if (exclude_level == NO_EXCLUDES)
 805                 goto skip_excludes;
 806
 807         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 808                 rprintf(FINFO, "skipping directory %s\n", thisname);
 809                 return NULL;
 810         }
 811
 812         /* We only care about directories because we need to avoid recursing
 813          * into a mount-point directory, not to avoid copying a symlinked
 814          * file if -L (or similar) was specified. */
 815         if (one_file_system && st.st_dev != filesystem_dev
 816             && S_ISDIR(st.st_mode))
 817                 flags |= FLAG_MOUNT_POINT;
 818
 819         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 820                 return NULL;
 821
 822         if (lp_ignore_nonreadable(module_id)) {
 823 #if SUPPORT_LINKS
 824                 if (!S_ISLNK(st.st_mode))
 825 #endif
 826                         if (access(thisname, R_OK) != 0)
 827                                 return NULL;
 828         }
 829
 830 skip_excludes:
 831
 832         if (verbose > 2) {
 833                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 834                         who_am_i(), thisname, exclude_level);
 835         }
 836
 837         if ((basename = strrchr(thisname, '/')) != NULL) {
 838                 dirname_len = ++basename - thisname; /* counts future '\0' */
 839                 if (lastdir_len == dirname_len - 1
 840                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 841                         dirname = lastdir;
 842                         dirname_len = 0; /* indicates no copy is needed */
 843                 } else
 844                         dirname = thisname;
 845         } else {
 846                 basename = thisname;
 847                 dirname = NULL;
 848                 dirname_len = 0;
 849         }
 850         basename_len = strlen(basename) + 1; /* count the '\0' */
 851
 852 #if SUPPORT_LINKS
 853         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 854 #else
 855         linkname_len = 0;
 856 #endif
 857
 858         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 859
 860         alloc_len = file_struct_len + dirname_len + basename_len
 861             + linkname_len + sum_len;
 862         if (flist) {
 863                 bp = pool_alloc(flist->file_pool, alloc_len,
 864                     "receive_file_entry");
 865         } else {
 866                 if (!(bp = new_array(char, alloc_len)))
 867                         out_of_memory("receive_file_entry");
 868         }
 869
 870         file = (struct file_struct *)bp;
 871         memset(bp, 0, file_struct_len);
 872         bp += file_struct_len;
 873
 874         file->flags = flags;
 875         file->modtime = st.st_mtime;
 876         file->length = st.st_size;
 877         file->mode = st.st_mode;
 878         file->uid = st.st_uid;
 879         file->gid = st.st_gid;
 880
 881 #if SUPPORT_HARD_LINKS
 882         if (flist && flist->hlink_pool) {
 883                 if (protocol_version < 28) {
 884                         if (S_ISREG(st.st_mode))
 885                                 file->link_u.idev = pool_talloc(
 886                                     flist->hlink_pool, struct idev, 1,
 887                                     "inode_table");
 888                 } else {
 889                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 890                                 file->link_u.idev = pool_talloc(
 891                                     flist->hlink_pool, struct idev, 1,
 892                                     "inode_table");
 893                 }
 894         }
 895         if (file->link_u.idev) {
 896                 file->F_DEV = st.st_dev;
 897                 file->F_INODE = st.st_ino;
 898         }
 899 #endif
 900
 901         if (dirname_len) {
 902                 file->dirname = lastdir = bp;
 903                 lastdir_len = dirname_len - 1;
 904                 memcpy(bp, dirname, dirname_len - 1);
 905                 bp += dirname_len;
 906                 bp[-1] = '\0';
 907         } else if (dirname)
 908                 file->dirname = dirname;
 909
 910         file->basename = bp;
 911         memcpy(bp, basename, basename_len);
 912         bp += basename_len;
 913
 914 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 915         if (preserve_devices && IS_DEVICE(st.st_mode))
 916                 file->u.rdev = st.st_rdev;
 917 #endif
 918
 919 #if SUPPORT_LINKS
 920         if (linkname_len) {
 921                 file->u.link = bp;
 922                 memcpy(bp, linkname, linkname_len);
 923                 bp += linkname_len;
 924         }
 925 #endif
 926
 927         if (sum_len) {
 928                 file->u.sum = bp;
 929                 file_checksum(thisname, bp, st.st_size);
 930                 /*bp += sum_len;*/
 931         }
 932
 933         file->basedir = flist_dir;
 934
 935         /* This code is only used by the receiver when it is building
 936          * a list of files for a delete pass. */
 937         if (keep_dirlinks && linkname_len && flist) {
 938                 STRUCT_STAT st2;
 939                 int i = flist_find(received_flist, file);
 940                 if (i >= 0 && S_ISDIR(received_flist->files[i]->mode)
 941                     && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
 942                         file->modtime = st2.st_mtime;
 943                         file->length = st2.st_size;
 944                         file->mode = st2.st_mode;
 945                         file->uid = st2.st_uid;
 946                         file->gid = st2.st_gid;
 947                         file->u.link = NULL;
 948                         if (file->link_u.idev) {
 949                                 pool_free(flist->hlink_pool, 0, file->link_u.idev);
 950                                 file->link_u.idev = NULL;
 951                         }
 952                 }
 953         }
 954
 955         if (!S_ISDIR(st.st_mode))
 956                 stats.total_size += st.st_size;
 957
 958         return file;
 959 }
 960
 961
 962 void send_file_name(int f, struct file_list *flist, char *fname,
 963                     int recursive, unsigned short base_flags)
 964 {
 965         struct file_struct *file;
 966         char fbuf[MAXPATHLEN];
 967
 968         /* f is set to -1 when calculating deletion file list */
 969         file = make_file(fname, flist,
 970             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 971
 972         if (!file)
 973                 return;
 974
 975         maybe_emit_filelist_progress(flist);
 976
 977         flist_expand(flist);
 978
 979         if (file->basename[0]) {
 980                 flist->files[flist->count++] = file;
 981                 send_file_entry(file, f, base_flags);
 982         }
 983
 984         if (recursive && S_ISDIR(file->mode)
 985             && !(file->flags & FLAG_MOUNT_POINT)) {
 986                 struct exclude_list_struct last_list = local_exclude_list;
 987                 local_exclude_list.head = local_exclude_list.tail = NULL;
 988                 send_directory(f, flist, f_name_to(file, fbuf));
 989                 if (verbose > 2) {
 990                         rprintf(FINFO, "[%s] popping %sexclude list\n",
 991                                 who_am_i(), local_exclude_list.debug_type);
 992                 }
 993                 clear_exclude_list(&local_exclude_list);
 994                 local_exclude_list = last_list;
 995         }
 996 }
 997
 998
 999 static void send_directory(int f, struct file_list *flist, char *dir)
1000 {
1001         DIR *d;
1002         struct dirent *di;
1003         char fname[MAXPATHLEN];
1004         unsigned int offset;
1005         char *p;
1006
1007         d = opendir(dir);
1008         if (!d) {
1009                 io_error |= IOERR_GENERAL;
1010                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(dir));
1011                 return;
1012         }
1013
1014         offset = strlcpy(fname, dir, MAXPATHLEN);
1015         p = fname + offset;
1016         if (offset >= MAXPATHLEN || p[-1] != '/') {
1017                 if (offset >= MAXPATHLEN - 1) {
1018                         io_error |= IOERR_GENERAL;
1019                         rprintf(FERROR, "skipping long-named directory: %s\n",
1020                                 full_fname(fname));
1021                         closedir(d);
1022                         return;
1023                 }
1024                 *p++ = '/';
1025                 offset++;
1026         }
1027
1028         if (cvs_exclude) {
1029                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
1030                     < MAXPATHLEN - offset) {
1031                         add_exclude_file(&local_exclude_list, fname,
1032                                          XFLG_WORD_SPLIT | XFLG_WORDS_ONLY);
1033                 } else {
1034                         io_error |= IOERR_GENERAL;
1035                         rprintf(FINFO,
1036                                 "cannot cvs-exclude in long-named directory %s\n",
1037                                 full_fname(fname));
1038                 }
1039         }
1040
1041         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1042                 char *dname = d_name(di);
1043                 if (dname[0] == '.' && (dname[1] == '\0'
1044                     || (dname[1] == '.' && dname[2] == '\0')))
1045                         continue;
1046                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1047                         send_file_name(f, flist, fname, recurse, 0);
1048                 else {
1049                         io_error |= IOERR_GENERAL;
1050                         rprintf(FINFO,
1051                                 "cannot send long-named file %s\n",
1052                                 full_fname(fname));
1053                 }
1054         }
1055         if (errno) {
1056                 io_error |= IOERR_GENERAL;
1057                 rsyserr(FERROR, errno, "readdir(%s)", dir);
1058         }
1059
1060         closedir(d);
1061 }
1062
1063
1064 /**
1065  * This function is normally called by the sender, but the receiver also
1066  * uses it to construct its own file list if --delete has been specified.
1067  * The delete_files() function in receiver.c sets f to -1 so that we just
1068  * construct the file list in memory without sending it over the wire.  It
1069  * also has the side-effect of ignoring user-excludes if delete_excluded
1070  * is set (so that the delete list includes user-excluded files).
1071  **/
1072 struct file_list *send_file_list(int f, int argc, char *argv[])
1073 {
1074         int l;
1075         STRUCT_STAT st;
1076         char *p, *dir, olddir[sizeof curr_dir];
1077         char lastpath[MAXPATHLEN] = "";
1078         struct file_list *flist;
1079         int64 start_write;
1080         int use_ff_fd = 0;
1081
1082         if (show_filelist_p() && f != -1)
1083                 start_filelist_progress("building file list");
1084
1085         start_write = stats.total_written;
1086
1087         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1088             "send_file_list");
1089
1090         if (f != -1) {
1091                 io_start_buffering_out();
1092                 if (filesfrom_fd >= 0) {
1093                         if (argv[0] && !push_dir(argv[0])) {
1094                                 rsyserr(FERROR, errno, "push_dir %s failed",
1095                                         full_fname(argv[0]));
1096                                 exit_cleanup(RERR_FILESELECT);
1097                         }
1098                         use_ff_fd = 1;
1099                 }
1100         }
1101
1102         while (1) {
1103                 char fname2[MAXPATHLEN];
1104                 char *fname = fname2;
1105
1106                 if (use_ff_fd) {
1107                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1108                                 break;
1109                         sanitize_path(fname, fname, "", 0);
1110                 } else {
1111                         if (argc-- == 0)
1112                                 break;
1113                         strlcpy(fname, *argv++, MAXPATHLEN);
1114                         if (sanitize_paths)
1115                                 sanitize_path(fname, fname, "", 0);
1116                 }
1117
1118                 l = strlen(fname);
1119                 if (fname[l - 1] == '/') {
1120                         if (l == 2 && fname[0] == '.') {
1121                                 /* Turn "./" into just "." rather than "./." */
1122                                 fname[1] = '\0';
1123                         } else if (l < MAXPATHLEN) {
1124                                 fname[l++] = '.';
1125                                 fname[l] = '\0';
1126                         }
1127                 }
1128
1129                 if (link_stat(fname, &st, keep_dirlinks) != 0) {
1130                         if (f != -1) {
1131                                 io_error |= IOERR_GENERAL;
1132                                 rsyserr(FERROR, errno, "link_stat %s failed",
1133                                         full_fname(fname));
1134                         }
1135                         continue;
1136                 }
1137
1138                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1139                         rprintf(FINFO, "skipping directory %s\n", fname);
1140                         continue;
1141                 }
1142
1143                 dir = NULL;
1144                 olddir[0] = '\0';
1145
1146                 if (!relative_paths) {
1147                         p = strrchr(fname, '/');
1148                         if (p) {
1149                                 *p = 0;
1150                                 if (p == fname)
1151                                         dir = "/";
1152                                 else
1153                                         dir = fname;
1154                                 fname = p + 1;
1155                         }
1156                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1157                         /* this ensures we send the intermediate directories,
1158                            thus getting their permissions right */
1159                         char *lp = lastpath, *fn = fname, *slash = fname;
1160                         *p = 0;
1161                         /* Skip any initial directories in our path that we
1162                          * have in common with lastpath. */
1163                         while (*fn && *lp == *fn) {
1164                                 if (*fn == '/')
1165                                         slash = fn;
1166                                 lp++, fn++;
1167                         }
1168                         *p = '/';
1169                         if (fn != p || (*lp && *lp != '/')) {
1170                                 int copy_links_saved = copy_links;
1171                                 int recurse_saved = recurse;
1172                                 copy_links = copy_unsafe_links;
1173                                 /* set recurse to 1 to prevent make_file
1174                                  * from ignoring directory, but still
1175                                  * turn off the recursive parameter to
1176                                  * send_file_name */
1177                                 recurse = 1;
1178                                 while ((slash = strchr(slash+1, '/')) != 0) {
1179                                         *slash = 0;
1180                                         send_file_name(f, flist, fname, 0, 0);
1181                                         *slash = '/';
1182                                 }
1183                                 copy_links = copy_links_saved;
1184                                 recurse = recurse_saved;
1185                                 *p = 0;
1186                                 strlcpy(lastpath, fname, sizeof lastpath);
1187                                 *p = '/';
1188                         }
1189                 }
1190
1191                 if (!*fname)
1192                         fname = ".";
1193
1194                 if (dir && *dir) {
1195                         static char *lastdir;
1196                         static int lastdir_len;
1197
1198                         strcpy(olddir, curr_dir); /* can't overflow */
1199
1200                         if (!push_dir(dir)) {
1201                                 io_error |= IOERR_GENERAL;
1202                                 rsyserr(FERROR, errno, "push_dir %s failed",
1203                                         full_fname(dir));
1204                                 continue;
1205                         }
1206
1207                         if (lastdir && strcmp(lastdir, dir) == 0) {
1208                                 flist_dir = lastdir;
1209                                 flist_dir_len = lastdir_len;
1210                         } else {
1211                                 flist_dir = lastdir = strdup(dir);
1212                                 flist_dir_len = lastdir_len = strlen(dir);
1213                         }
1214                 }
1215
1216                 if (one_file_system)
1217                         set_filesystem(fname);
1218
1219                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1220
1221                 if (olddir[0]) {
1222                         flist_dir = NULL;
1223                         flist_dir_len = 0;
1224                         if (!pop_dir(olddir)) {
1225                                 rsyserr(FERROR, errno, "pop_dir %s failed",
1226                                         full_fname(dir));
1227                                 exit_cleanup(RERR_FILESELECT);
1228                         }
1229                 }
1230         }
1231
1232         if (f != -1) {
1233                 send_file_entry(NULL, f, 0);
1234
1235                 if (show_filelist_p())
1236                         finish_filelist_progress(flist);
1237         }
1238
1239         if (flist->hlink_pool) {
1240                 pool_destroy(flist->hlink_pool);
1241                 flist->hlink_pool = NULL;
1242         }
1243
1244         clean_flist(flist, 0, 0);
1245
1246         if (f != -1) {
1247                 /* Now send the uid/gid list. This was introduced in
1248                  * protocol version 15 */
1249                 send_uid_list(f);
1250
1251                 /* send the io_error flag */
1252                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1253
1254                 io_end_buffering();
1255                 stats.flist_size = stats.total_written - start_write;
1256                 stats.num_files = flist->count;
1257         }
1258
1259         if (verbose > 3)
1260                 output_flist(flist);
1261
1262         if (verbose > 2)
1263                 rprintf(FINFO, "send_file_list done\n");
1264
1265         return flist;
1266 }
1267
1268
1269 struct file_list *recv_file_list(int f)
1270 {
1271         struct file_list *flist;
1272         unsigned short flags;
1273         int64 start_read;
1274
1275         if (show_filelist_p())
1276                 start_filelist_progress("receiving file list");
1277
1278         start_read = stats.total_read;
1279
1280         flist = flist_new(WITH_HLINK, "recv_file_list");
1281         received_flist = flist;
1282
1283         flist->count = 0;
1284         flist->malloced = 1000;
1285         flist->files = new_array(struct file_struct *, flist->malloced);
1286         if (!flist->files)
1287                 goto oom;
1288
1289
1290         while ((flags = read_byte(f)) != 0) {
1291                 int i = flist->count;
1292
1293                 flist_expand(flist);
1294
1295                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1296                         flags |= read_byte(f) << 8;
1297                 receive_file_entry(&flist->files[i], flags, flist, f);
1298
1299                 if (S_ISREG(flist->files[i]->mode))
1300                         stats.total_size += flist->files[i]->length;
1301
1302                 flist->count++;
1303
1304                 maybe_emit_filelist_progress(flist);
1305
1306                 if (verbose > 2) {
1307                         rprintf(FINFO, "recv_file_name(%s)\n",
1308                                 f_name(flist->files[i]));
1309                 }
1310         }
1311         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1312
1313         if (verbose > 2)
1314                 rprintf(FINFO, "received %d names\n", flist->count);
1315
1316         if (show_filelist_p())
1317                 finish_filelist_progress(flist);
1318
1319         clean_flist(flist, relative_paths, 1);
1320
1321         if (f != -1) {
1322                 /* Now send the uid/gid list. This was introduced in
1323                  * protocol version 15 */
1324                 recv_uid_list(f, flist);
1325
1326                 /* Recv the io_error flag */
1327                 if (lp_ignore_errors(module_id) || ignore_errors)
1328                         read_int(f);
1329                 else
1330                         io_error |= read_int(f);
1331         }
1332
1333         if (verbose > 3)
1334                 output_flist(flist);
1335
1336         if (list_only) {
1337                 int i;
1338                 for (i = 0; i < flist->count; i++)
1339                         list_file_entry(flist->files[i]);
1340         }
1341
1342         if (verbose > 2)
1343                 rprintf(FINFO, "recv_file_list done\n");
1344
1345         stats.flist_size = stats.total_read - start_read;
1346         stats.num_files = flist->count;
1347
1348         return flist;
1349
1350 oom:
1351         out_of_memory("recv_file_list");
1352         return NULL;            /* not reached */
1353 }
1354
1355
1356 int file_compare(struct file_struct **file1, struct file_struct **file2)
1357 {
1358         struct file_struct *f1 = *file1;
1359         struct file_struct *f2 = *file2;
1360
1361         if (!f1->basename && !f2->basename)
1362                 return 0;
1363         if (!f1->basename)
1364                 return -1;
1365         if (!f2->basename)
1366                 return 1;
1367         if (f1->dirname == f2->dirname)
1368                 return u_strcmp(f1->basename, f2->basename);
1369         return f_name_cmp(f1, f2);
1370 }
1371
1372
1373 int flist_find(struct file_list *flist, struct file_struct *f)
1374 {
1375         int low = 0, high = flist->count - 1;
1376
1377         while (high >= 0 && !flist->files[high]->basename) high--;
1378
1379         if (high < 0)
1380                 return -1;
1381
1382         while (low != high) {
1383                 int mid = (low + high) / 2;
1384                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1385                 if (ret == 0)
1386                         return flist_up(flist, mid);
1387                 if (ret > 0)
1388                         high = mid;
1389                 else
1390                         low = mid + 1;
1391         }
1392
1393         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1394                 return flist_up(flist, low);
1395         return -1;
1396 }
1397
1398 /*
1399  * Free up any resources a file_struct has allocated
1400  * and clear the file.
1401  */
1402 void clear_file(int i, struct file_list *flist)
1403 {
1404         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1405                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1406         memset(flist->files[i], 0, file_struct_len);
1407 }
1408
1409
1410 /*
1411  * allocate a new file list
1412  */
1413 struct file_list *flist_new(int with_hlink, char *msg)
1414 {
1415         struct file_list *flist;
1416
1417         flist = new(struct file_list);
1418         if (!flist)
1419                 out_of_memory(msg);
1420
1421         memset(flist, 0, sizeof (struct file_list));
1422
1423         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1424             out_of_memory, POOL_INTERN)))
1425                 out_of_memory(msg);
1426
1427 #if SUPPORT_HARD_LINKS
1428         if (with_hlink && preserve_hard_links) {
1429                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1430                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1431                         out_of_memory(msg);
1432         }
1433 #endif
1434
1435         return flist;
1436 }
1437
1438 /*
1439  * free up all elements in a flist
1440  */
1441 void flist_free(struct file_list *flist)
1442 {
1443         pool_destroy(flist->file_pool);
1444         pool_destroy(flist->hlink_pool);
1445         free(flist->files);
1446         free(flist);
1447 }
1448
1449
1450 /*
1451  * This routine ensures we don't have any duplicate names in our file list.
1452  * duplicate names can cause corruption because of the pipelining
1453  */
1454 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1455 {
1456         int i, prev_i = 0;
1457
1458         if (!flist || flist->count == 0)
1459                 return;
1460
1461         qsort(flist->files, flist->count,
1462             sizeof flist->files[0], (int (*)())file_compare);
1463
1464         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1465                 if (flist->files[i]->basename) {
1466                         prev_i = i;
1467                         break;
1468                 }
1469         }
1470         while (++i < flist->count) {
1471                 if (!flist->files[i]->basename)
1472                         continue;
1473                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1474                         if (verbose > 1 && !am_server) {
1475                                 rprintf(FINFO,
1476                                         "removing duplicate name %s from file list %d\n",
1477                                         f_name(flist->files[i]), i);
1478                         }
1479                         /* Make sure that if we unduplicate '.', that we don't
1480                          * lose track of a user-specified starting point (or
1481                          * else deletions will mysteriously fail with -R). */
1482                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1483                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1484
1485                         clear_file(i, flist);
1486                 } else
1487                         prev_i = i;
1488         }
1489
1490         if (strip_root) {
1491                 /* we need to strip off the root directory in the case
1492                    of relative paths, but this must be done _after_
1493                    the sorting phase */
1494                 for (i = 0; i < flist->count; i++) {
1495                         if (flist->files[i]->dirname &&
1496                             flist->files[i]->dirname[0] == '/') {
1497                                 memmove(&flist->files[i]->dirname[0],
1498                                         &flist->files[i]->dirname[1],
1499                                         strlen(flist->files[i]->dirname));
1500                         }
1501
1502                         if (flist->files[i]->dirname &&
1503                             !flist->files[i]->dirname[0]) {
1504                                 flist->files[i]->dirname = NULL;
1505                         }
1506                 }
1507         }
1508 }
1509
1510 static void output_flist(struct file_list *flist)
1511 {
1512         char uidbuf[16], gidbuf[16];
1513         struct file_struct *file;
1514         int i;
1515
1516         for (i = 0; i < flist->count; i++) {
1517                 file = flist->files[i];
1518                 if ((am_root || am_sender) && preserve_uid)
1519                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1520                 else
1521                         *uidbuf = '\0';
1522                 if (preserve_gid && file->gid != GID_NONE)
1523                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1524                 else
1525                         *gidbuf = '\0';
1526                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1527                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1528                         NS(file->basename), (int)file->mode,
1529                         (double)file->length, uidbuf, gidbuf);
1530         }
1531 }
1532
1533
1534 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1535
1536 /* Compare the names of two file_struct entities, just like strcmp()
1537  * would do if it were operating on the joined strings.  We assume
1538  * that there are no 0-length strings.
1539  */
1540 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1541 {
1542         int dif;
1543         const uchar *c1, *c2;
1544         enum fnc_state state1, state2;
1545
1546         if (!f1 || !f1->basename) {
1547                 if (!f2 || !f2->basename)
1548                         return 0;
1549                 return -1;
1550         }
1551         if (!f2 || !f2->basename)
1552                 return 1;
1553
1554         if (!(c1 = (uchar*)f1->dirname)) {
1555                 state1 = fnc_BASE;
1556                 c1 = (uchar*)f1->basename;
1557         } else if (!*c1) {
1558                 state1 = fnc_SLASH;
1559                 c1 = (uchar*)"/";
1560         } else
1561                 state1 = fnc_DIR;
1562         if (!(c2 = (uchar*)f2->dirname)) {
1563                 state2 = fnc_BASE;
1564                 c2 = (uchar*)f2->basename;
1565         } else if (!*c2) {
1566                 state2 = fnc_SLASH;
1567                 c2 = (uchar*)"/";
1568         } else
1569                 state2 = fnc_DIR;
1570
1571         while (1) {
1572                 if ((dif = (int)*c1 - (int)*c2) != 0)
1573                         break;
1574                 if (!*++c1) {
1575                         switch (state1) {
1576                         case fnc_DIR:
1577                                 state1 = fnc_SLASH;
1578                                 c1 = (uchar*)"/";
1579                                 break;
1580                         case fnc_SLASH:
1581                                 state1 = fnc_BASE;
1582                                 c1 = (uchar*)f1->basename;
1583                                 break;
1584                         case fnc_BASE:
1585                                 break;
1586                         }
1587                 }
1588                 if (!*++c2) {
1589                         switch (state2) {
1590                         case fnc_DIR:
1591                                 state2 = fnc_SLASH;
1592                                 c2 = (uchar*)"/";
1593                                 break;
1594                         case fnc_SLASH:
1595                                 state2 = fnc_BASE;
1596                                 c2 = (uchar*)f2->basename;
1597                                 break;
1598                         case fnc_BASE:
1599                                 if (!*c1)
1600                                         return 0;
1601                                 break;
1602                         }
1603                 }
1604         }
1605
1606         return dif;
1607 }
1608
1609
1610 /* Return a copy of the full filename of a flist entry, using the indicated
1611  * buffer.  No size-checking is done because we checked the size when creating
1612  * the file_struct entry.
1613  */
1614 char *f_name_to(struct file_struct *f, char *fbuf)
1615 {
1616         if (!f || !f->basename)
1617                 return NULL;
1618
1619         if (f->dirname) {
1620                 int len = strlen(f->dirname);
1621                 memcpy(fbuf, f->dirname, len);
1622                 fbuf[len] = '/';
1623                 strcpy(fbuf + len + 1, f->basename);
1624         } else
1625                 strcpy(fbuf, f->basename);
1626         return fbuf;
1627 }
1628
1629
1630 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1631  */
1632 char *f_name(struct file_struct *f)
1633 {
1634         static char names[5][MAXPATHLEN];
1635         static unsigned int n;
1636
1637         n = (n + 1) % (sizeof names / sizeof names[0]);
1638
1639         return f_name_to(f, names[n]);
1640 }