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