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             "server pattern"))
 232                 return 1;
 233         if (exclude_level != ALL_EXCLUDES)
 234                 return 0;
 235         if (exclude_list && check_exclude(exclude_list, fname, is_dir,
 236             "pattern"))
 237                 return 1;
 238         if (local_exclude_list
 239          && check_exclude(local_exclude_list, fname, is_dir,
 240             "local-cvsignore"))
 241                 return 1;
 242         return 0;
 243 }
 244
 245 /* used by the one_file_system code */
 246 static dev_t filesystem_dev;
 247
 248 static void set_filesystem(char *fname)
 249 {
 250         STRUCT_STAT st;
 251         if (link_stat(fname, &st) != 0)
 252                 return;
 253         filesystem_dev = st.st_dev;
 254 }
 255
 256
 257 static int to_wire_mode(mode_t mode)
 258 {
 259 #if SUPPORT_LINKS
 260         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 261                 return (mode & ~(_S_IFMT)) | 0120000;
 262 #endif
 263         return (int) mode;
 264 }
 265
 266 static mode_t from_wire_mode(int mode)
 267 {
 268         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 269                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 270         return (mode_t) mode;
 271 }
 272
 273
 274 static void send_directory(int f, struct file_list *flist, char *dir);
 275
 276 static char *flist_dir;
 277 static int flist_dir_len;
 278
 279
 280 /**
 281  * Make sure @p flist is big enough to hold at least @p flist->count
 282  * entries.
 283  **/
 284 void flist_expand(struct file_list *flist)
 285 {
 286         void *new_ptr;
 287
 288         if (flist->count < flist->malloced)
 289                 return;
 290
 291         if (flist->malloced < FLIST_START)
 292                 flist->malloced = FLIST_START;
 293         else if (flist->malloced >= FLIST_LINEAR)
 294                 flist->malloced += FLIST_LINEAR;
 295         else
 296                 flist->malloced *= 2;
 297
 298         /*
 299          * In case count jumped or we are starting the list
 300          * with a known size just set it.
 301          */
 302         if (flist->malloced < flist->count)
 303                 flist->malloced = flist->count;
 304
 305         if (flist->files) {
 306                 new_ptr = realloc_array(flist->files,
 307                     struct file_struct *, flist->malloced);
 308         } else {
 309                 new_ptr = new_array(struct file_struct *, flist->malloced);
 310         }
 311
 312         if (verbose >= 2) {
 313                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 314                     who_am_i(),
 315                     (double) sizeof flist->files[0] * flist->malloced,
 316                     (new_ptr == flist->files) ? " not" : "");
 317         }
 318
 319         flist->files = (struct file_struct **) new_ptr;
 320
 321         if (!flist->files)
 322                 out_of_memory("flist_expand");
 323 }
 324
 325 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 326 {
 327         unsigned short flags;
 328         static time_t modtime;
 329         static mode_t mode;
 330         static dev_t dev, rdev;
 331         static uint32 rdev_major;
 332         static uid_t uid;
 333         static gid_t gid;
 334         static char lastname[MAXPATHLEN];
 335         char *fname, fbuf[MAXPATHLEN];
 336         int l1, l2;
 337
 338         if (f == -1)
 339                 return;
 340
 341         if (!file) {
 342                 write_byte(f, 0);
 343                 modtime = 0, mode = 0;
 344                 dev = rdev = makedev(0, 0);
 345                 rdev_major = 0;
 346                 uid = 0, gid = 0;
 347                 *lastname = '\0';
 348                 return;
 349         }
 350
 351         io_write_phase = "send_file_entry";
 352
 353         fname = f_name_to(file, fbuf);
 354
 355         flags = base_flags;
 356
 357         if (file->mode == mode)
 358                 flags |= XMIT_SAME_MODE;
 359         else
 360                 mode = file->mode;
 361         if (preserve_devices) {
 362                 if (protocol_version < 28) {
 363                         if (IS_DEVICE(mode)) {
 364                                 if (file->u.rdev == rdev)
 365                                         flags |= XMIT_SAME_RDEV_pre28;
 366                                 else
 367                                         rdev = file->u.rdev;
 368                         } else
 369                                 rdev = makedev(0, 0);
 370                 } else if (IS_DEVICE(mode)) {
 371                         rdev = file->u.rdev;
 372                         if ((uint32)major(rdev) == rdev_major)
 373                                 flags |= XMIT_SAME_RDEV_MAJOR;
 374                         else
 375                                 rdev_major = major(rdev);
 376                         if ((uint32)minor(rdev) <= 0xFFu)
 377                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 378                 }
 379         }
 380         if (file->uid == uid)
 381                 flags |= XMIT_SAME_UID;
 382         else
 383                 uid = file->uid;
 384         if (file->gid == gid)
 385                 flags |= XMIT_SAME_GID;
 386         else
 387                 gid = file->gid;
 388         if (file->modtime == modtime)
 389                 flags |= XMIT_SAME_TIME;
 390         else
 391                 modtime = file->modtime;
 392
 393 #if SUPPORT_HARD_LINKS
 394         if (file->link_u.idev) {
 395                 if (file->F_DEV == dev) {
 396                         if (protocol_version >= 28)
 397                                 flags |= XMIT_SAME_DEV;
 398                 } else
 399                         dev = file->F_DEV;
 400                 flags |= XMIT_HAS_IDEV_DATA;
 401         }
 402 #endif
 403
 404         for (l1 = 0;
 405             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 406             l1++) {}
 407         l2 = strlen(fname+l1);
 408
 409         if (l1 > 0)
 410                 flags |= XMIT_SAME_NAME;
 411         if (l2 > 255)
 412                 flags |= XMIT_LONG_NAME;
 413
 414         /* We must make sure we don't send a zero flag byte or the
 415          * other end will terminate the flist transfer.  Note that
 416          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 417          * it's harmless way to add a bit to the first flag byte. */
 418         if (protocol_version >= 28) {
 419                 if (!flags && !S_ISDIR(mode))
 420                         flags |= XMIT_TOP_DIR;
 421                 if ((flags & 0xFF00) || !flags) {
 422                         flags |= XMIT_EXTENDED_FLAGS;
 423                         write_byte(f, flags);
 424                         write_byte(f, flags >> 8);
 425                 } else
 426                         write_byte(f, flags);
 427         } else {
 428                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 429                         flags |= XMIT_TOP_DIR;
 430                 if (!(flags & 0xFF))
 431                         flags |= XMIT_LONG_NAME;
 432                 write_byte(f, flags);
 433         }
 434         if (flags & XMIT_SAME_NAME)
 435                 write_byte(f, l1);
 436         if (flags & XMIT_LONG_NAME)
 437                 write_int(f, l2);
 438         else
 439                 write_byte(f, l2);
 440         write_buf(f, fname + l1, l2);
 441
 442         write_longint(f, file->length);
 443         if (!(flags & XMIT_SAME_TIME))
 444                 write_int(f, modtime);
 445         if (!(flags & XMIT_SAME_MODE))
 446                 write_int(f, to_wire_mode(mode));
 447         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 448                 if (!numeric_ids)
 449                         add_uid(uid);
 450                 write_int(f, uid);
 451         }
 452         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 453                 if (!numeric_ids)
 454                         add_gid(gid);
 455                 write_int(f, gid);
 456         }
 457         if (preserve_devices && IS_DEVICE(mode)) {
 458                 if (protocol_version < 28) {
 459                         if (!(flags & XMIT_SAME_RDEV_pre28))
 460                                 write_int(f, (int)rdev);
 461                 } else {
 462                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 463                                 write_int(f, major(rdev));
 464                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 465                                 write_byte(f, minor(rdev));
 466                         else
 467                                 write_int(f, minor(rdev));
 468                 }
 469         }
 470
 471 #if SUPPORT_LINKS
 472         if (preserve_links && S_ISLNK(mode)) {
 473                 int len = strlen(file->u.link);
 474                 write_int(f, len);
 475                 write_buf(f, file->u.link, len);
 476         }
 477 #endif
 478
 479 #if SUPPORT_HARD_LINKS
 480         if (flags & XMIT_HAS_IDEV_DATA) {
 481                 if (protocol_version >= 28) {
 482                         /* major/minor dev_t and 64-bit ino_t */
 483                         if (!(flags & XMIT_SAME_DEV)) {
 484                                 write_int(f, major(dev));
 485                                 write_int(f, minor(dev));
 486                         }
 487                         write_longint(f, file->F_INODE);
 488                 } else if (protocol_version < 26) {
 489                         /* 32-bit dev_t and ino_t */
 490                         write_int(f, dev);
 491                         write_int(f, file->F_INODE);
 492                 } else {
 493                         /* 64-bit dev_t and ino_t */
 494                         write_longint(f, dev);
 495                         write_longint(f, file->F_INODE);
 496                 }
 497         }
 498 #endif
 499
 500         if (always_checksum) {
 501                 char *sum;
 502                 if (S_ISREG(mode))
 503                         sum = file->u.sum;
 504                 else if (protocol_version < 28) {
 505                         /* Prior to 28, we sent a useless set of nulls. */
 506                         sum = empty_sum;
 507                 } else
 508                         sum = NULL;
 509                 if (sum) {
 510                         write_buf(f, sum,
 511                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 512                 }
 513         }
 514
 515         strlcpy(lastname, fname, MAXPATHLEN);
 516
 517         io_write_phase = "unknown";
 518 }
 519
 520
 521
 522 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 523     struct file_list *flist, int f)
 524 {
 525         static time_t modtime;
 526         static mode_t mode;
 527         static dev_t dev, rdev;
 528         static uint32 rdev_major;
 529         static uid_t uid;
 530         static gid_t gid;
 531         static char lastname[MAXPATHLEN], *lastdir;
 532         static int lastdir_len = -1;
 533         char thisname[MAXPATHLEN];
 534         unsigned int l1 = 0, l2 = 0;
 535         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 536         OFF_T file_length;
 537         char *basename, *dirname, *bp;
 538         struct file_struct *file;
 539
 540         if (!fptr) {
 541                 modtime = 0, mode = 0;
 542                 dev = rdev = makedev(0, 0);
 543                 rdev_major = 0;
 544                 uid = 0, gid = 0;
 545                 *lastname = '\0';
 546                 return;
 547         }
 548
 549         if (flags & XMIT_SAME_NAME)
 550                 l1 = read_byte(f);
 551
 552         if (flags & XMIT_LONG_NAME)
 553                 l2 = read_int(f);
 554         else
 555                 l2 = read_byte(f);
 556
 557         if (l2 >= MAXPATHLEN - l1) {
 558                 rprintf(FERROR,
 559                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 560                         flags, l1, l2, lastname);
 561                 overflow("receive_file_entry");
 562         }
 563
 564         strlcpy(thisname, lastname, l1 + 1);
 565         read_sbuf(f, &thisname[l1], l2);
 566         thisname[l1 + l2] = 0;
 567
 568         strlcpy(lastname, thisname, MAXPATHLEN);
 569
 570         clean_fname(thisname);
 571
 572         if (sanitize_paths)
 573                 sanitize_path(thisname, NULL);
 574
 575         if ((basename = strrchr(thisname, '/')) != NULL) {
 576                 dirname_len = ++basename - thisname; /* counts future '\0' */
 577                 if (lastdir_len == dirname_len - 1
 578                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 579                         dirname = lastdir;
 580                         dirname_len = 0; /* indicates no copy is needed */
 581                 } else
 582                         dirname = thisname;
 583         } else {
 584                 basename = thisname;
 585                 dirname = NULL;
 586                 dirname_len = 0;
 587         }
 588         basename_len = strlen(basename) + 1; /* count the '\0' */
 589
 590         file_length = read_longint(f);
 591         if (!(flags & XMIT_SAME_TIME))
 592                 modtime = (time_t)read_int(f);
 593         if (!(flags & XMIT_SAME_MODE))
 594                 mode = from_wire_mode(read_int(f));
 595
 596         if (preserve_uid && !(flags & XMIT_SAME_UID))
 597                 uid = (uid_t)read_int(f);
 598         if (preserve_gid && !(flags & XMIT_SAME_GID))
 599                 gid = (gid_t)read_int(f);
 600
 601         if (preserve_devices) {
 602                 if (protocol_version < 28) {
 603                         if (IS_DEVICE(mode)) {
 604                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 605                                         rdev = (dev_t)read_int(f);
 606                         } else
 607                                 rdev = makedev(0, 0);
 608                 } else if (IS_DEVICE(mode)) {
 609                         uint32 rdev_minor;
 610                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 611                                 rdev_major = read_int(f);
 612                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 613                                 rdev_minor = read_byte(f);
 614                         else
 615                                 rdev_minor = read_int(f);
 616                         rdev = makedev(rdev_major, rdev_minor);
 617                 }
 618         }
 619
 620 #if SUPPORT_LINKS
 621         if (preserve_links && S_ISLNK(mode)) {
 622                 linkname_len = read_int(f) + 1; /* count the '\0' */
 623                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 624                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 625                                 linkname_len - 1);
 626                         overflow("receive_file_entry");
 627                 }
 628         }
 629         else
 630 #endif
 631                 linkname_len = 0;
 632
 633         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 634
 635         alloc_len = file_struct_len + dirname_len + basename_len
 636                   + linkname_len + sum_len;
 637         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 638
 639         file = *fptr = (struct file_struct *)bp;
 640         memset(bp, 0, file_struct_len);
 641         bp += file_struct_len;
 642
 643         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 644         file->modtime = modtime;
 645         file->length = file_length;
 646         file->mode = mode;
 647         file->uid = uid;
 648         file->gid = gid;
 649
 650         if (dirname_len) {
 651                 file->dirname = lastdir = bp;
 652                 lastdir_len = dirname_len - 1;
 653                 memcpy(bp, dirname, dirname_len - 1);
 654                 bp += dirname_len;
 655                 bp[-1] = '\0';
 656         } else if (dirname)
 657                 file->dirname = dirname;
 658
 659         file->basename = bp;
 660         memcpy(bp, basename, basename_len);
 661         bp += basename_len;
 662
 663         if (preserve_devices && IS_DEVICE(mode))
 664                 file->u.rdev = rdev;
 665
 666 #if SUPPORT_LINKS
 667         if (linkname_len) {
 668                 file->u.link = bp;
 669                 read_sbuf(f, bp, linkname_len - 1);
 670                 if (sanitize_paths)
 671                         sanitize_path(bp, lastdir);
 672                 bp += linkname_len;
 673         }
 674 #endif
 675
 676 #if SUPPORT_HARD_LINKS
 677         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 678                 flags |= XMIT_HAS_IDEV_DATA;
 679         if (flags & XMIT_HAS_IDEV_DATA) {
 680                 INO64_T inode;
 681                 if (protocol_version >= 28) {
 682                         if (!(flags & XMIT_SAME_DEV)) {
 683                                 uint32 dev_major = read_int(f);
 684                                 uint32 dev_minor = read_int(f);
 685                                 dev = makedev(dev_major, dev_minor);
 686                         }
 687                         inode = read_longint(f);
 688                 } else if (protocol_version < 26) {
 689                         dev = (dev_t)read_int(f);
 690                         inode = read_int(f);
 691                 } else {
 692                         dev = (dev_t)read_longint(f);
 693                         inode = read_longint(f);
 694                 }
 695                 if (flist->hlink_pool) {
 696                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 697                             struct idev, 1, "inode_table");
 698                         file->F_INODE = inode;
 699                         file->F_DEV = dev;
 700                 }
 701         }
 702 #endif
 703
 704         if (always_checksum) {
 705                 char *sum;
 706                 if (sum_len) {
 707                         file->u.sum = sum = bp;
 708                         /*bp += sum_len;*/
 709                 } else if (protocol_version < 28) {
 710                         /* Prior to 28, we get a useless set of nulls. */
 711                         sum = empty_sum;
 712                 } else
 713                         sum = NULL;
 714                 if (sum) {
 715                         read_buf(f, sum,
 716                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 717                 }
 718         }
 719
 720         if (!preserve_perms) {
 721                 extern int orig_umask;
 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,
 745     struct file_list *flist, 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)     /* lastdir isn't valid if flist is NULL */
 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);
 767         if (sanitize_paths)
 768                 sanitize_path(thisname, NULL);
 769
 770         memset(sum, 0, SUM_LENGTH);
 771
 772         if (readlink_stat(thisname, &st, linkname) != 0) {
 773                 int save_errno = errno;
 774                 if (errno == ENOENT) {
 775                         enum logcode c = am_daemon && protocol_version < 28
 776                             ? FERROR : FINFO;
 777                         /* either symlink pointing nowhere or file that
 778                          * was removed during rsync run; see if excluded
 779                          * before reporting an error */
 780                         if (exclude_level != NO_EXCLUDES
 781                             && check_exclude_file(thisname, 0, exclude_level)) {
 782                                 /* file is excluded anyway, ignore silently */
 783                                 return NULL;
 784                         }
 785                         io_error |= IOERR_VANISHED;
 786                         rprintf(c, "file has vanished: %s\n",
 787                             full_fname(thisname));
 788                 }
 789                 else {
 790                         io_error |= IOERR_GENERAL;
 791                         rprintf(FERROR, "readlink %s failed: %s\n",
 792                             full_fname(thisname), strerror(save_errno));
 793                 }
 794                 return NULL;
 795         }
 796
 797         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 798         if (exclude_level == NO_EXCLUDES)
 799                 goto skip_excludes;
 800
 801         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 802                 rprintf(FINFO, "skipping directory %s\n", thisname);
 803                 return NULL;
 804         }
 805
 806         /* We only care about directories because we need to avoid recursing
 807          * into a mount-point directory, not to avoid copying a symlinked
 808          * file if -L (or similar) was specified. */
 809         if (one_file_system && st.st_dev != filesystem_dev
 810             && S_ISDIR(st.st_mode))
 811                 flags |= FLAG_MOUNT_POINT;
 812
 813         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 814                 return NULL;
 815
 816         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 817                 return NULL;
 818
 819 skip_excludes:
 820
 821         if (verbose > 2) {
 822                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 823                         who_am_i(), thisname, exclude_level);
 824         }
 825
 826         if ((basename = strrchr(thisname, '/')) != NULL) {
 827                 dirname_len = ++basename - thisname; /* counts future '\0' */
 828                 if (lastdir_len == dirname_len - 1
 829                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 830                         dirname = lastdir;
 831                         dirname_len = 0; /* indicates no copy is needed */
 832                 } else
 833                         dirname = thisname;
 834         } else {
 835                 basename = thisname;
 836                 dirname = NULL;
 837                 dirname_len = 0;
 838         }
 839         basename_len = strlen(basename) + 1; /* count the '\0' */
 840
 841 #if SUPPORT_LINKS
 842         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 843 #else
 844         linkname_len = 0;
 845 #endif
 846
 847         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 848
 849         alloc_len = file_struct_len + dirname_len + basename_len
 850             + linkname_len + sum_len;
 851         if (flist) {
 852                 bp = pool_alloc(flist->file_pool, alloc_len,
 853                     "receive_file_entry");
 854         } else {
 855                 if (!(bp = new_array(char, alloc_len)))
 856                         out_of_memory("receive_file_entry");
 857         }
 858
 859         file = (struct file_struct *)bp;
 860         memset(bp, 0, file_struct_len);
 861         bp += file_struct_len;
 862
 863         file->flags = flags;
 864         file->modtime = st.st_mtime;
 865         file->length = st.st_size;
 866         file->mode = st.st_mode;
 867         file->uid = st.st_uid;
 868         file->gid = st.st_gid;
 869
 870 #if SUPPORT_HARD_LINKS
 871         if (flist && flist->hlink_pool) {
 872                 if (protocol_version < 28) {
 873                         if (S_ISREG(st.st_mode))
 874                                 file->link_u.idev = pool_talloc(
 875                                     flist->hlink_pool, struct idev, 1,
 876                                     "inode_table");
 877                 } else {
 878                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 879                                 file->link_u.idev = pool_talloc(
 880                                     flist->hlink_pool, struct idev, 1,
 881                                     "inode_table");
 882                 }
 883         }
 884         if (file->link_u.idev) {
 885                 file->F_DEV = st.st_dev;
 886                 file->F_INODE = st.st_ino;
 887         }
 888 #endif
 889
 890         if (dirname_len) {
 891                 file->dirname = lastdir = bp;
 892                 lastdir_len = dirname_len - 1;
 893                 memcpy(bp, dirname, dirname_len - 1);
 894                 bp += dirname_len;
 895                 bp[-1] = '\0';
 896         } else if (dirname)
 897                 file->dirname = dirname;
 898
 899         file->basename = bp;
 900         memcpy(bp, basename, basename_len);
 901         bp += basename_len;
 902
 903 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 904         if (preserve_devices && IS_DEVICE(st.st_mode))
 905                 file->u.rdev = st.st_rdev;
 906 #endif
 907
 908 #if SUPPORT_LINKS
 909         if (linkname_len) {
 910                 file->u.link = bp;
 911                 memcpy(bp, linkname, linkname_len);
 912                 bp += linkname_len;
 913         }
 914 #endif
 915
 916         if (sum_len) {
 917                 file->u.sum = bp;
 918                 file_checksum(thisname, bp, st.st_size);
 919                 /*bp += sum_len;*/
 920         }
 921
 922         file->basedir = flist_dir;
 923
 924         if (!S_ISDIR(st.st_mode))
 925                 stats.total_size += st.st_size;
 926
 927         return file;
 928 }
 929
 930
 931 void send_file_name(int f, struct file_list *flist, char *fname,
 932                     int recursive, unsigned short base_flags)
 933 {
 934         struct file_struct *file;
 935         char fbuf[MAXPATHLEN];
 936         extern int delete_excluded;
 937
 938         /* f is set to -1 when calculating deletion file list */
 939         file = make_file(fname, flist,
 940             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
 941
 942         if (!file)
 943                 return;
 944
 945         maybe_emit_filelist_progress(flist);
 946
 947         flist_expand(flist);
 948
 949         if (write_batch)
 950                 file->flags |= FLAG_TOP_DIR;
 951
 952         if (file->basename[0]) {
 953                 flist->files[flist->count++] = file;
 954                 send_file_entry(file, f, base_flags);
 955         }
 956
 957         if (recursive && S_ISDIR(file->mode)
 958             && !(file->flags & FLAG_MOUNT_POINT)) {
 959                 struct exclude_struct **last_exclude_list = local_exclude_list;
 960                 send_directory(f, flist, f_name_to(file, fbuf));
 961                 local_exclude_list = last_exclude_list;
 962                 return;
 963         }
 964 }
 965
 966
 967 static void send_directory(int f, struct file_list *flist, char *dir)
 968 {
 969         DIR *d;
 970         struct dirent *di;
 971         char fname[MAXPATHLEN];
 972         unsigned int offset;
 973         char *p;
 974
 975         d = opendir(dir);
 976         if (!d) {
 977                 io_error |= IOERR_GENERAL;
 978                 rprintf(FERROR, "opendir %s failed: %s\n",
 979                         full_fname(dir), strerror(errno));
 980                 return;
 981         }
 982
 983         offset = strlcpy(fname, dir, MAXPATHLEN);
 984         p = fname + offset;
 985         if (offset >= MAXPATHLEN || p[-1] != '/') {
 986                 if (offset >= MAXPATHLEN - 1) {
 987                         io_error |= IOERR_GENERAL;
 988                         rprintf(FERROR, "skipping long-named directory: %s\n",
 989                                 full_fname(fname));
 990                         closedir(d);
 991                         return;
 992                 }
 993                 *p++ = '/';
 994                 offset++;
 995         }
 996
 997         local_exclude_list = NULL;
 998
 999         if (cvs_exclude) {
1000                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
1001                     < MAXPATHLEN - offset) {
1002                         add_exclude_file(&local_exclude_list, fname,
1003                                          XFLG_WORD_SPLIT | XFLG_NO_PREFIXES);
1004                 } else {
1005                         io_error |= IOERR_GENERAL;
1006                         rprintf(FINFO,
1007                                 "cannot cvs-exclude in long-named directory %s\n",
1008                                 full_fname(fname));
1009                 }
1010         }
1011
1012         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1013                 char *dname = d_name(di);
1014                 if (dname[0] == '.' && (dname[1] == '\0'
1015                     || (dname[1] == '.' && dname[2] == '\0')))
1016                         continue;
1017                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1018                         send_file_name(f, flist, fname, recurse, 0);
1019                 else {
1020                         io_error |= IOERR_GENERAL;
1021                         rprintf(FINFO,
1022                                 "cannot send long-named file %s\n",
1023                                 full_fname(fname));
1024                 }
1025         }
1026         if (errno) {
1027                 io_error |= IOERR_GENERAL;
1028                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1029                         dir, errno, strerror(errno));
1030         }
1031
1032         if (local_exclude_list)
1033                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1034
1035         closedir(d);
1036 }
1037
1038
1039 /**
1040  * The delete_files() function in receiver.c sets f to -1 so that we just
1041  * construct the file list in memory without sending it over the wire.  It
1042  * also has the side-effect of ignoring user-excludes if delete_excluded
1043  * is set (so that the delete list includes user-excluded files).
1044  **/
1045 struct file_list *send_file_list(int f, int argc, char *argv[])
1046 {
1047         int l;
1048         STRUCT_STAT st;
1049         char *p, *dir, olddir[sizeof curr_dir];
1050         char lastpath[MAXPATHLEN] = "";
1051         struct file_list *flist;
1052         int64 start_write;
1053         int use_ff_fd = 0;
1054
1055         if (show_filelist_p() && f != -1)
1056                 start_filelist_progress("building file list");
1057
1058         start_write = stats.total_written;
1059
1060         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1061             "send_file_list");
1062
1063         if (f != -1) {
1064                 io_start_buffering_out(f);
1065                 if (filesfrom_fd >= 0) {
1066                         if (argv[0] && !push_dir(argv[0])) {
1067                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1068                                         full_fname(argv[0]), strerror(errno));
1069                                 exit_cleanup(RERR_FILESELECT);
1070                         }
1071                         use_ff_fd = 1;
1072                 }
1073         }
1074
1075         while (1) {
1076                 char fname2[MAXPATHLEN];
1077                 char *fname = fname2;
1078
1079                 if (use_ff_fd) {
1080                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1081                                 break;
1082                         sanitize_path(fname, NULL);
1083                 } else {
1084                         if (argc-- == 0)
1085                                 break;
1086                         strlcpy(fname, *argv++, MAXPATHLEN);
1087                         if (sanitize_paths)
1088                                 sanitize_path(fname, NULL);
1089                 }
1090
1091                 l = strlen(fname);
1092                 if (fname[l - 1] == '/') {
1093                         if (l == 2 && fname[0] == '.') {
1094                                 /* Turn "./" into just "." rather than "./." */
1095                                 fname[1] = '\0';
1096                         } else if (l < MAXPATHLEN) {
1097                                 fname[l++] = '.';
1098                                 fname[l] = '\0';
1099                         }
1100                 }
1101
1102                 if (link_stat(fname, &st) != 0) {
1103                         if (f != -1) {
1104                                 io_error |= IOERR_GENERAL;
1105                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1106                                         full_fname(fname), strerror(errno));
1107                         }
1108                         continue;
1109                 }
1110
1111                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1112                         rprintf(FINFO, "skipping directory %s\n", fname);
1113                         continue;
1114                 }
1115
1116                 dir = NULL;
1117                 olddir[0] = '\0';
1118
1119                 if (!relative_paths) {
1120                         p = strrchr(fname, '/');
1121                         if (p) {
1122                                 *p = 0;
1123                                 if (p == fname)
1124                                         dir = "/";
1125                                 else
1126                                         dir = fname;
1127                                 fname = p + 1;
1128                         }
1129                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1130                         /* this ensures we send the intermediate directories,
1131                            thus getting their permissions right */
1132                         char *lp = lastpath, *fn = fname, *slash = fname;
1133                         *p = 0;
1134                         /* Skip any initial directories in our path that we
1135                          * have in common with lastpath. */
1136                         while (*fn && *lp == *fn) {
1137                                 if (*fn == '/')
1138                                         slash = fn;
1139                                 lp++, fn++;
1140                         }
1141                         *p = '/';
1142                         if (fn != p || (*lp && *lp != '/')) {
1143                                 int copy_links_saved = copy_links;
1144                                 int recurse_saved = recurse;
1145                                 copy_links = copy_unsafe_links;
1146                                 /* set recurse to 1 to prevent make_file
1147                                  * from ignoring directory, but still
1148                                  * turn off the recursive parameter to
1149                                  * send_file_name */
1150                                 recurse = 1;
1151                                 while ((slash = strchr(slash+1, '/')) != 0) {
1152                                         *slash = 0;
1153                                         send_file_name(f, flist, fname, 0, 0);
1154                                         *slash = '/';
1155                                 }
1156                                 copy_links = copy_links_saved;
1157                                 recurse = recurse_saved;
1158                                 *p = 0;
1159                                 strlcpy(lastpath, fname, sizeof lastpath);
1160                                 *p = '/';
1161                         }
1162                 }
1163
1164                 if (!*fname)
1165                         fname = ".";
1166
1167                 if (dir && *dir) {
1168                         static char *lastdir;
1169                         static int lastdir_len;
1170
1171                         strcpy(olddir, curr_dir); /* can't overflow */
1172
1173                         if (!push_dir(dir)) {
1174                                 io_error |= IOERR_GENERAL;
1175                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1176                                         full_fname(dir), strerror(errno));
1177                                 continue;
1178                         }
1179
1180                         if (lastdir && strcmp(lastdir, dir) == 0) {
1181                                 flist_dir = lastdir;
1182                                 flist_dir_len = lastdir_len;
1183                         } else {
1184                                 flist_dir = lastdir = strdup(dir);
1185                                 flist_dir_len = lastdir_len = strlen(dir);
1186                         }
1187                 }
1188
1189                 if (one_file_system)
1190                         set_filesystem(fname);
1191
1192                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1193
1194                 if (olddir[0]) {
1195                         flist_dir = NULL;
1196                         flist_dir_len = 0;
1197                         if (!pop_dir(olddir)) {
1198                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1199                                         full_fname(dir), strerror(errno));
1200                                 exit_cleanup(RERR_FILESELECT);
1201                         }
1202                 }
1203         }
1204
1205         if (f != -1) {
1206                 send_file_entry(NULL, f, 0);
1207
1208                 if (show_filelist_p())
1209                         finish_filelist_progress(flist);
1210         }
1211
1212         if (flist->hlink_pool) {
1213                 pool_destroy(flist->hlink_pool);
1214                 flist->hlink_pool = NULL;
1215         }
1216
1217         clean_flist(flist, 0, 0);
1218
1219         if (f != -1) {
1220                 /* Now send the uid/gid list. This was introduced in
1221                  * protocol version 15 */
1222                 send_uid_list(f);
1223
1224                 /* send the io_error flag */
1225                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1226
1227                 io_end_buffering();
1228                 stats.flist_size = stats.total_written - start_write;
1229                 stats.num_files = flist->count;
1230                 if (write_batch)
1231                         write_batch_flist_info(flist->count, flist->files);
1232         }
1233
1234         if (verbose > 3)
1235                 output_flist(flist);
1236
1237         if (verbose > 2)
1238                 rprintf(FINFO, "send_file_list done\n");
1239
1240         return flist;
1241 }
1242
1243
1244 struct file_list *recv_file_list(int f)
1245 {
1246         struct file_list *flist;
1247         unsigned short flags;
1248         int64 start_read;
1249         extern int list_only;
1250
1251         if (show_filelist_p())
1252                 start_filelist_progress("receiving file list");
1253
1254         start_read = stats.total_read;
1255
1256         flist = flist_new(WITH_HLINK, "recv_file_list");
1257
1258         flist->count = 0;
1259         flist->malloced = 1000;
1260         flist->files = new_array(struct file_struct *, flist->malloced);
1261         if (!flist->files)
1262                 goto oom;
1263
1264
1265         while ((flags = read_byte(f)) != 0) {
1266                 int i = flist->count;
1267
1268                 flist_expand(flist);
1269
1270                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1271                         flags |= read_byte(f) << 8;
1272                 receive_file_entry(&flist->files[i], flags, flist, f);
1273
1274                 if (S_ISREG(flist->files[i]->mode))
1275                         stats.total_size += flist->files[i]->length;
1276
1277                 flist->count++;
1278
1279                 maybe_emit_filelist_progress(flist);
1280
1281                 if (verbose > 2) {
1282                         rprintf(FINFO, "recv_file_name(%s)\n",
1283                                 f_name(flist->files[i]));
1284                 }
1285         }
1286         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1287
1288         if (verbose > 2)
1289                 rprintf(FINFO, "received %d names\n", flist->count);
1290
1291         if (show_filelist_p())
1292                 finish_filelist_progress(flist);
1293
1294         clean_flist(flist, relative_paths, 1);
1295
1296         if (f != -1) {
1297                 /* Now send the uid/gid list. This was introduced in
1298                  * protocol version 15 */
1299                 recv_uid_list(f, flist);
1300
1301                 if (!read_batch) {
1302                         /* Recv the io_error flag */
1303                         if (lp_ignore_errors(module_id) || ignore_errors)
1304                                 read_int(f);
1305                         else
1306                                 io_error |= read_int(f);
1307                 }
1308         }
1309
1310         if (verbose > 3)
1311                 output_flist(flist);
1312
1313         if (list_only) {
1314                 int i;
1315                 for (i = 0; i < flist->count; i++)
1316                         list_file_entry(flist->files[i]);
1317         }
1318
1319         if (verbose > 2)
1320                 rprintf(FINFO, "recv_file_list done\n");
1321
1322         stats.flist_size = stats.total_read - start_read;
1323         stats.num_files = flist->count;
1324
1325         return flist;
1326
1327 oom:
1328         out_of_memory("recv_file_list");
1329         return NULL;            /* not reached */
1330 }
1331
1332
1333 int file_compare(struct file_struct **file1, struct file_struct **file2)
1334 {
1335         struct file_struct *f1 = *file1;
1336         struct file_struct *f2 = *file2;
1337
1338         if (!f1->basename && !f2->basename)
1339                 return 0;
1340         if (!f1->basename)
1341                 return -1;
1342         if (!f2->basename)
1343                 return 1;
1344         if (f1->dirname == f2->dirname)
1345                 return u_strcmp(f1->basename, f2->basename);
1346         return f_name_cmp(f1, f2);
1347 }
1348
1349
1350 int flist_find(struct file_list *flist, struct file_struct *f)
1351 {
1352         int low = 0, high = flist->count - 1;
1353
1354         while (high >= 0 && !flist->files[high]->basename) high--;
1355
1356         if (high < 0)
1357                 return -1;
1358
1359         while (low != high) {
1360                 int mid = (low + high) / 2;
1361                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1362                 if (ret == 0)
1363                         return flist_up(flist, mid);
1364                 if (ret > 0)
1365                         high = mid;
1366                 else
1367                         low = mid + 1;
1368         }
1369
1370         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1371                 return flist_up(flist, low);
1372         return -1;
1373 }
1374
1375 /*
1376  * Free up any resources a file_struct has allocated
1377  * and clear the file.
1378  */
1379 void clear_file(int i, struct file_list *flist)
1380 {
1381         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1382                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1383         memset(flist->files[i], 0, file_struct_len);
1384 }
1385
1386
1387 /*
1388  * allocate a new file list
1389  */
1390 struct file_list *flist_new(int with_hlink, char *msg)
1391 {
1392         struct file_list *flist;
1393
1394         flist = new(struct file_list);
1395         if (!flist)
1396                 out_of_memory(msg);
1397
1398         memset(flist, 0, sizeof (struct file_list));
1399
1400         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1401             out_of_memory, POOL_INTERN)))
1402                 out_of_memory(msg);
1403
1404 #if SUPPORT_HARD_LINKS
1405         if (with_hlink && preserve_hard_links) {
1406                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1407                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1408                         out_of_memory(msg);
1409         }
1410 #endif
1411
1412         return flist;
1413 }
1414
1415 /*
1416  * free up all elements in a flist
1417  */
1418 void flist_free(struct file_list *flist)
1419 {
1420         pool_destroy(flist->file_pool);
1421         pool_destroy(flist->hlink_pool);
1422         free(flist->files);
1423         free(flist);
1424 }
1425
1426
1427 /*
1428  * This routine ensures we don't have any duplicate names in our file list.
1429  * duplicate names can cause corruption because of the pipelining
1430  */
1431 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1432 {
1433         int i, prev_i = 0;
1434
1435         if (!flist || flist->count == 0)
1436                 return;
1437
1438         qsort(flist->files, flist->count,
1439             sizeof flist->files[0], (int (*)()) file_compare);
1440
1441         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1442                 if (flist->files[i]->basename) {
1443                         prev_i = i;
1444                         break;
1445                 }
1446         }
1447         while (++i < flist->count) {
1448                 if (!flist->files[i]->basename)
1449                         continue;
1450                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1451                         if (verbose > 1 && !am_server) {
1452                                 rprintf(FINFO,
1453                                         "removing duplicate name %s from file list %d\n",
1454                                         f_name(flist->files[i]), i);
1455                         }
1456                         /* Make sure that if we unduplicate '.', that we don't
1457                          * lose track of a user-specified starting point (or
1458                          * else deletions will mysteriously fail with -R). */
1459                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1460                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1461
1462                         clear_file(i, flist);
1463                 } else
1464                         prev_i = i;
1465         }
1466
1467         if (strip_root) {
1468                 /* we need to strip off the root directory in the case
1469                    of relative paths, but this must be done _after_
1470                    the sorting phase */
1471                 for (i = 0; i < flist->count; i++) {
1472                         if (flist->files[i]->dirname &&
1473                             flist->files[i]->dirname[0] == '/') {
1474                                 memmove(&flist->files[i]->dirname[0],
1475                                         &flist->files[i]->dirname[1],
1476                                         strlen(flist->files[i]->dirname));
1477                         }
1478
1479                         if (flist->files[i]->dirname &&
1480                             !flist->files[i]->dirname[0]) {
1481                                 flist->files[i]->dirname = NULL;
1482                         }
1483                 }
1484         }
1485 }
1486
1487 static void output_flist(struct file_list *flist)
1488 {
1489         char uidbuf[16], gidbuf[16];
1490         struct file_struct *file;
1491         int i;
1492
1493         for (i = 0; i < flist->count; i++) {
1494                 file = flist->files[i];
1495                 if (am_root && preserve_uid)
1496                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1497                 else
1498                         *uidbuf = '\0';
1499                 if (preserve_gid && file->gid != GID_NONE)
1500                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1501                 else
1502                         *gidbuf = '\0';
1503                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1504                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1505                         NS(file->basename), (int) file->mode,
1506                         (double) file->length, uidbuf, gidbuf);
1507         }
1508 }
1509
1510
1511 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1512
1513 /* Compare the names of two file_struct entities, just like strcmp()
1514  * would do if it were operating on the joined strings.  We assume
1515  * that there are no 0-length strings.
1516  */
1517 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1518 {
1519         int dif;
1520         const uchar *c1, *c2;
1521         enum fnc_state state1, state2;
1522
1523         if (!f1 || !f1->basename) {
1524                 if (!f2 || !f2->basename)
1525                         return 0;
1526                 return -1;
1527         }
1528         if (!f2 || !f2->basename)
1529                 return 1;
1530
1531         if (!(c1 = (uchar*)f1->dirname)) {
1532                 state1 = fnc_BASE;
1533                 c1 = (uchar*)f1->basename;
1534         } else
1535                 state1 = fnc_DIR;
1536         if (!(c2 = (uchar*)f2->dirname)) {
1537                 state2 = fnc_BASE;
1538                 c2 = (uchar*)f2->basename;
1539         } else
1540                 state2 = fnc_DIR;
1541
1542         while (1) {
1543                 if ((dif = (int)*c1 - (int)*c2) != 0)
1544                         break;
1545                 if (!*++c1) {
1546                         switch (state1) {
1547                         case fnc_DIR:
1548                                 state1 = fnc_SLASH;
1549                                 c1 = (uchar*)"/";
1550                                 break;
1551                         case fnc_SLASH:
1552                                 state1 = fnc_BASE;
1553                                 c1 = (uchar*)f1->basename;
1554                                 break;
1555                         case fnc_BASE:
1556                                 break;
1557                         }
1558                 }
1559                 if (!*++c2) {
1560                         switch (state2) {
1561                         case fnc_DIR:
1562                                 state2 = fnc_SLASH;
1563                                 c2 = (uchar*)"/";
1564                                 break;
1565                         case fnc_SLASH:
1566                                 state2 = fnc_BASE;
1567                                 c2 = (uchar*)f2->basename;
1568                                 break;
1569                         case fnc_BASE:
1570                                 if (!*c1)
1571                                         return 0;
1572                                 break;
1573                         }
1574                 }
1575         }
1576
1577         return dif;
1578 }
1579
1580
1581 /* Return a copy of the full filename of a flist entry, using the indicated
1582  * buffer.  No size-checking is done because we checked the size when creating
1583  * the file_struct entry.
1584  */
1585 char *f_name_to(struct file_struct *f, char *fbuf)
1586 {
1587         if (!f || !f->basename)
1588                 return NULL;
1589
1590         if (f->dirname) {
1591                 int len = strlen(f->dirname);
1592                 memcpy(fbuf, f->dirname, len);
1593                 fbuf[len] = '/';
1594                 strcpy(fbuf + len + 1, f->basename);
1595         } else
1596                 strcpy(fbuf, f->basename);
1597         return fbuf;
1598 }
1599
1600
1601 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1602  */
1603 char *f_name(struct file_struct *f)
1604 {
1605         static char names[5][MAXPATHLEN];
1606         static unsigned int n;
1607
1608         n = (n + 1) % (sizeof names / sizeof names[0]);
1609
1610         return f_name_to(f, names[n]);
1611 }