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 int verbose;
  31 extern int dry_run;
  32 extern int list_only;
  33 extern int am_root;
  34 extern int am_server;
  35 extern int am_daemon;
  36 extern int am_sender;
  37 extern int do_progress;
  38 extern int always_checksum;
  39 extern int module_id;
  40 extern int ignore_errors;
  41 extern int numeric_ids;
  42 extern int recurse;
  43 extern int xfer_dirs;
  44 extern int filesfrom_fd;
  45 extern int one_file_system;
  46 extern int keep_dirlinks;
  47 extern int preserve_links;
  48 extern int preserve_hard_links;
  49 extern int preserve_perms;
  50 extern int preserve_devices;
  51 extern int preserve_uid;
  52 extern int preserve_gid;
  53 extern int relative_paths;
  54 extern int implied_dirs;
  55 extern int copy_links;
  56 extern int copy_unsafe_links;
  57 extern int protocol_version;
  58 extern int sanitize_paths;
  59 extern int orig_umask;
  60 extern struct stats stats;
  61 extern struct file_list *the_file_list;
  62
  63 extern char curr_dir[MAXPATHLEN];
  64
  65 extern struct filter_list_struct filter_list;
  66 extern struct filter_list_struct server_filter_list;
  67
  68 int io_error;
  69 dev_t filesystem_dev; /* used to implement -x */
  70
  71 static char empty_sum[MD4_SUM_LENGTH];
  72 static int flist_count_offset;
  73 static unsigned int file_struct_len;
  74 static struct file_list *sorting_flist;
  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 && xfer_dirs && !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(int count)
 103 {
 104         rprintf(FINFO, " %d files...\r", count);
 105 }
 106
 107
 108 static void maybe_emit_filelist_progress(int count)
 109 {
 110         if (do_progress && show_filelist_p() && (count % 100) == 0)
 111                 emit_filelist_progress(count);
 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
 140         permstring(perms, f->mode);
 141
 142 #ifdef SUPPORT_LINKS
 143         if (preserve_links && S_ISLNK(f->mode)) {
 144                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 145                         perms,
 146                         (double)f->length, timestring(f->modtime),
 147                         safe_fname(f_name(f)), safe_fname(f->u.link));
 148         } else
 149 #endif
 150         {
 151                 rprintf(FINFO, "%s %11.0f %s %s\n",
 152                         perms,
 153                         (double)f->length, timestring(f->modtime),
 154                         safe_fname(f_name(f)));
 155         }
 156 }
 157
 158
 159 /**
 160  * Stat either a symlink or its referent, depending on the settings of
 161  * copy_links, copy_unsafe_links, etc.
 162  *
 163  * @retval -1 on error
 164  *
 165  * @retval 0 for success
 166  *
 167  * @post If @p path is a symlink, then @p linkbuf (of size @c
 168  * MAXPATHLEN) contains the symlink target.
 169  *
 170  * @post @p buffer contains information about the link or the
 171  * referrent as appropriate, if they exist.
 172  **/
 173 static int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 174 {
 175 #ifdef SUPPORT_LINKS
 176         if (copy_links)
 177                 return do_stat(path, buffer);
 178         if (link_stat(path, buffer, 0) < 0)
 179                 return -1;
 180         if (S_ISLNK(buffer->st_mode)) {
 181                 int l = readlink((char *)path, linkbuf, MAXPATHLEN - 1);
 182                 if (l == -1)
 183                         return -1;
 184                 linkbuf[l] = 0;
 185                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 186                         if (verbose > 1) {
 187                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 188                                         safe_fname(path), safe_fname(linkbuf));
 189                         }
 190                         return do_stat(path, buffer);
 191                 }
 192         }
 193         return 0;
 194 #else
 195         return do_stat(path, buffer);
 196 #endif
 197 }
 198
 199 int link_stat(const char *path, STRUCT_STAT *buffer, int follow_dirlinks)
 200 {
 201 #ifdef SUPPORT_LINKS
 202         if (copy_links)
 203                 return do_stat(path, buffer);
 204         if (do_lstat(path, buffer) < 0)
 205                 return -1;
 206         if (follow_dirlinks && S_ISLNK(buffer->st_mode)) {
 207                 STRUCT_STAT st;
 208                 if (do_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
 209                         *buffer = st;
 210         }
 211         return 0;
 212 #else
 213         return do_stat(path, buffer);
 214 #endif
 215 }
 216
 217 /* This function is used to check if a file should be included/excluded
 218  * from the list of files based on its name and type etc.  The value of
 219  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 220 static int is_excluded(char *fname, int is_dir, int filter_level)
 221 {
 222 #if 0 /* This currently never happens, so avoid a useless compare. */
 223         if (filter_level == NO_FILTERS)
 224                 return 0;
 225 #endif
 226         if (fname) {
 227                 /* never exclude '.', even if somebody does --exclude '*' */
 228                 if (fname[0] == '.' && !fname[1])
 229                         return 0;
 230                 /* Handle the -R version of the '.' dir. */
 231                 if (fname[0] == '/') {
 232                         int len = strlen(fname);
 233                         if (fname[len-1] == '.' && fname[len-2] == '/')
 234                                 return 0;
 235                 }
 236         }
 237         if (server_filter_list.head
 238             && check_filter(&server_filter_list, fname, is_dir) < 0)
 239                 return 1;
 240         if (filter_level != ALL_FILTERS)
 241                 return 0;
 242         if (filter_list.head
 243             && check_filter(&filter_list, fname, is_dir) < 0)
 244                 return 1;
 245         return 0;
 246 }
 247
 248 static int to_wire_mode(mode_t mode)
 249 {
 250 #ifdef SUPPORT_LINKS
 251         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 252                 return (mode & ~(_S_IFMT)) | 0120000;
 253 #endif
 254         return (int)mode;
 255 }
 256
 257 static mode_t from_wire_mode(int mode)
 258 {
 259         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 260                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 261         return (mode_t)mode;
 262 }
 263
 264
 265 static void send_directory(int f, struct file_list *flist,
 266                            char *fbuf, int len);
 267
 268 static char *flist_dir;
 269 static int flist_dir_len;
 270
 271
 272 /**
 273  * Make sure @p flist is big enough to hold at least @p flist->count
 274  * entries.
 275  **/
 276 void flist_expand(struct file_list *flist)
 277 {
 278         struct file_struct **new_ptr;
 279
 280         if (flist->count < flist->malloced)
 281                 return;
 282
 283         if (flist->malloced < FLIST_START)
 284                 flist->malloced = FLIST_START;
 285         else if (flist->malloced >= FLIST_LINEAR)
 286                 flist->malloced += FLIST_LINEAR;
 287         else
 288                 flist->malloced *= 2;
 289
 290         /*
 291          * In case count jumped or we are starting the list
 292          * with a known size just set it.
 293          */
 294         if (flist->malloced < flist->count)
 295                 flist->malloced = flist->count;
 296
 297         new_ptr = realloc_array(flist->files, struct file_struct *,
 298                                 flist->malloced);
 299
 300         if (verbose >= 2 && flist->malloced != FLIST_START) {
 301                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 302                     who_am_i(),
 303                     (double)sizeof flist->files[0] * flist->malloced,
 304                     (new_ptr == flist->files) ? " not" : "");
 305         }
 306
 307         flist->files = new_ptr;
 308
 309         if (!flist->files)
 310                 out_of_memory("flist_expand");
 311 }
 312
 313 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 314 {
 315         unsigned short flags;
 316         static time_t modtime;
 317         static mode_t mode;
 318         static int64 dev;
 319         static dev_t rdev;
 320         static uint32 rdev_major;
 321         static uid_t uid;
 322         static gid_t gid;
 323         static char lastname[MAXPATHLEN];
 324         char fname[MAXPATHLEN];
 325         int l1, l2;
 326
 327         if (f < 0)
 328                 return;
 329
 330         if (!file) {
 331                 write_byte(f, 0);
 332                 modtime = 0, mode = 0;
 333                 dev = 0, rdev = makedev(0, 0);
 334                 rdev_major = 0;
 335                 uid = 0, gid = 0;
 336                 *lastname = '\0';
 337                 return;
 338         }
 339
 340         io_write_phase = "send_file_entry";
 341
 342         f_name_to(file, fname);
 343
 344         flags = base_flags;
 345
 346         if (file->mode == mode)
 347                 flags |= XMIT_SAME_MODE;
 348         else
 349                 mode = file->mode;
 350         if (preserve_devices) {
 351                 if (protocol_version < 28) {
 352                         if (IS_DEVICE(mode)) {
 353                                 if (file->u.rdev == rdev)
 354                                         flags |= XMIT_SAME_RDEV_pre28;
 355                                 else
 356                                         rdev = file->u.rdev;
 357                         } else
 358                                 rdev = makedev(0, 0);
 359                 } else if (IS_DEVICE(mode)) {
 360                         rdev = file->u.rdev;
 361                         if ((uint32)major(rdev) == rdev_major)
 362                                 flags |= XMIT_SAME_RDEV_MAJOR;
 363                         else
 364                                 rdev_major = major(rdev);
 365                         if ((uint32)minor(rdev) <= 0xFFu)
 366                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 367                 }
 368         }
 369         if (file->uid == uid)
 370                 flags |= XMIT_SAME_UID;
 371         else
 372                 uid = file->uid;
 373         if (file->gid == gid)
 374                 flags |= XMIT_SAME_GID;
 375         else
 376                 gid = file->gid;
 377         if (file->modtime == modtime)
 378                 flags |= XMIT_SAME_TIME;
 379         else
 380                 modtime = file->modtime;
 381
 382 #ifdef SUPPORT_HARD_LINKS
 383         if (file->link_u.idev) {
 384                 if (file->F_DEV == dev) {
 385                         if (protocol_version >= 28)
 386                                 flags |= XMIT_SAME_DEV;
 387                 } else
 388                         dev = file->F_DEV;
 389                 flags |= XMIT_HAS_IDEV_DATA;
 390         }
 391 #endif
 392
 393         for (l1 = 0;
 394             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 395             l1++) {}
 396         l2 = strlen(fname+l1);
 397
 398         if (l1 > 0)
 399                 flags |= XMIT_SAME_NAME;
 400         if (l2 > 255)
 401                 flags |= XMIT_LONG_NAME;
 402
 403         /* We must make sure we don't send a zero flag byte or the
 404          * other end will terminate the flist transfer.  Note that
 405          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 406          * it's harmless way to add a bit to the first flag byte. */
 407         if (protocol_version >= 28) {
 408                 if (!flags && !S_ISDIR(mode))
 409                         flags |= XMIT_TOP_DIR;
 410                 if ((flags & 0xFF00) || !flags) {
 411                         flags |= XMIT_EXTENDED_FLAGS;
 412                         write_byte(f, flags);
 413                         write_byte(f, flags >> 8);
 414                 } else
 415                         write_byte(f, flags);
 416         } else {
 417                 if (!(flags & 0xFF))
 418                         flags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 419                 write_byte(f, flags);
 420         }
 421         if (flags & XMIT_SAME_NAME)
 422                 write_byte(f, l1);
 423         if (flags & XMIT_LONG_NAME)
 424                 write_int(f, l2);
 425         else
 426                 write_byte(f, l2);
 427         write_buf(f, fname + l1, l2);
 428
 429         write_longint(f, file->length);
 430         if (!(flags & XMIT_SAME_TIME))
 431                 write_int(f, modtime);
 432         if (!(flags & XMIT_SAME_MODE))
 433                 write_int(f, to_wire_mode(mode));
 434         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 435                 if (!numeric_ids)
 436                         add_uid(uid);
 437                 write_int(f, uid);
 438         }
 439         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 440                 if (!numeric_ids)
 441                         add_gid(gid);
 442                 write_int(f, gid);
 443         }
 444         if (preserve_devices && IS_DEVICE(mode)) {
 445                 if (protocol_version < 28) {
 446                         if (!(flags & XMIT_SAME_RDEV_pre28))
 447                                 write_int(f, (int)rdev);
 448                 } else {
 449                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 450                                 write_int(f, major(rdev));
 451                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 452                                 write_byte(f, minor(rdev));
 453                         else
 454                                 write_int(f, minor(rdev));
 455                 }
 456         }
 457
 458 #ifdef SUPPORT_LINKS
 459         if (preserve_links && S_ISLNK(mode)) {
 460                 int len = strlen(file->u.link);
 461                 write_int(f, len);
 462                 write_buf(f, file->u.link, len);
 463         }
 464 #endif
 465
 466 #ifdef SUPPORT_HARD_LINKS
 467         if (flags & XMIT_HAS_IDEV_DATA) {
 468                 if (protocol_version < 26) {
 469                         /* 32-bit dev_t and ino_t */
 470                         write_int(f, dev);
 471                         write_int(f, file->F_INODE);
 472                 } else {
 473                         /* 64-bit dev_t and ino_t */
 474                         if (!(flags & XMIT_SAME_DEV))
 475                                 write_longint(f, dev);
 476                         write_longint(f, file->F_INODE);
 477                 }
 478         }
 479 #endif
 480
 481         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 482                 char *sum;
 483                 int slen = protocol_version < 21 ? 2 : MD4_SUM_LENGTH;
 484                 if (S_ISREG(mode))
 485                         sum = file->u.sum;
 486                 else {
 487                         /* Prior to 28, we sent a useless set of nulls. */
 488                         sum = empty_sum;
 489                 }
 490                 write_buf(f, sum, slen);
 491         }
 492
 493         strlcpy(lastname, fname, MAXPATHLEN);
 494
 495         io_write_phase = "unknown";
 496 }
 497
 498
 499
 500 static struct file_struct *receive_file_entry(struct file_list *flist,
 501                                               unsigned short flags, int f)
 502 {
 503         static time_t modtime;
 504         static mode_t mode;
 505         static int64 dev;
 506         static dev_t rdev;
 507         static uint32 rdev_major;
 508         static uid_t uid;
 509         static gid_t gid;
 510         static char lastname[MAXPATHLEN], *lastdir;
 511         static int lastdir_depth, lastdir_len = -1;
 512         static unsigned int del_hier_name_len = 0;
 513         static int in_del_hier = 0;
 514         char thisname[MAXPATHLEN];
 515         unsigned int l1 = 0, l2 = 0;
 516         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 517         OFF_T file_length;
 518         char *basename, *dirname, *bp;
 519         struct file_struct *file;
 520
 521         if (!flist) {
 522                 modtime = 0, mode = 0;
 523                 dev = 0, rdev = makedev(0, 0);
 524                 rdev_major = 0;
 525                 uid = 0, gid = 0;
 526                 *lastname = '\0';
 527                 lastdir_len = -1;
 528                 in_del_hier = 0;
 529                 return NULL;
 530         }
 531
 532         if (flags & XMIT_SAME_NAME)
 533                 l1 = read_byte(f);
 534
 535         if (flags & XMIT_LONG_NAME)
 536                 l2 = read_int(f);
 537         else
 538                 l2 = read_byte(f);
 539
 540         if (l2 >= MAXPATHLEN - l1) {
 541                 rprintf(FERROR,
 542                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 543                         flags, l1, l2, safe_fname(lastname));
 544                 overflow_exit("receive_file_entry");
 545         }
 546
 547         strlcpy(thisname, lastname, l1 + 1);
 548         read_sbuf(f, &thisname[l1], l2);
 549         thisname[l1 + l2] = 0;
 550
 551         strlcpy(lastname, thisname, MAXPATHLEN);
 552
 553         clean_fname(thisname, 0);
 554
 555         if (sanitize_paths)
 556                 sanitize_path(thisname, thisname, "", 0);
 557
 558         if ((basename = strrchr(thisname, '/')) != NULL) {
 559                 dirname_len = ++basename - thisname; /* counts future '\0' */
 560                 if (lastdir_len == dirname_len - 1
 561                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 562                         dirname = lastdir;
 563                         dirname_len = 0; /* indicates no copy is needed */
 564                 } else
 565                         dirname = thisname;
 566         } else {
 567                 basename = thisname;
 568                 dirname = NULL;
 569                 dirname_len = 0;
 570         }
 571         basename_len = strlen(basename) + 1; /* count the '\0' */
 572
 573         file_length = read_longint(f);
 574         if (!(flags & XMIT_SAME_TIME))
 575                 modtime = (time_t)read_int(f);
 576         if (!(flags & XMIT_SAME_MODE))
 577                 mode = from_wire_mode(read_int(f));
 578
 579         if (preserve_uid && !(flags & XMIT_SAME_UID))
 580                 uid = (uid_t)read_int(f);
 581         if (preserve_gid && !(flags & XMIT_SAME_GID))
 582                 gid = (gid_t)read_int(f);
 583
 584         if (preserve_devices) {
 585                 if (protocol_version < 28) {
 586                         if (IS_DEVICE(mode)) {
 587                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 588                                         rdev = (dev_t)read_int(f);
 589                         } else
 590                                 rdev = makedev(0, 0);
 591                 } else if (IS_DEVICE(mode)) {
 592                         uint32 rdev_minor;
 593                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 594                                 rdev_major = read_int(f);
 595                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 596                                 rdev_minor = read_byte(f);
 597                         else
 598                                 rdev_minor = read_int(f);
 599                         rdev = makedev(rdev_major, rdev_minor);
 600                 }
 601         }
 602
 603 #ifdef SUPPORT_LINKS
 604         if (preserve_links && S_ISLNK(mode)) {
 605                 linkname_len = read_int(f) + 1; /* count the '\0' */
 606                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 607                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 608                                 linkname_len - 1);
 609                         overflow_exit("receive_file_entry");
 610                 }
 611         }
 612         else
 613 #endif
 614                 linkname_len = 0;
 615
 616         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 617
 618         alloc_len = file_struct_len + dirname_len + basename_len
 619                   + linkname_len + sum_len;
 620         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 621
 622         file = (struct file_struct *)bp;
 623         memset(bp, 0, file_struct_len);
 624         bp += file_struct_len;
 625
 626         file->flags = 0;
 627         file->modtime = modtime;
 628         file->length = file_length;
 629         file->mode = mode;
 630         file->uid = uid;
 631         file->gid = gid;
 632
 633         if (dirname_len) {
 634                 file->dirname = lastdir = bp;
 635                 lastdir_len = dirname_len - 1;
 636                 memcpy(bp, dirname, dirname_len - 1);
 637                 bp += dirname_len;
 638                 bp[-1] = '\0';
 639                 lastdir_depth = count_dir_elements(lastdir);
 640                 file->dir.depth = lastdir_depth + 1;
 641         } else if (dirname) {
 642                 file->dirname = dirname; /* we're reusing lastname */
 643                 file->dir.depth = lastdir_depth + 1;
 644         } else
 645                 file->dir.depth = 1;
 646
 647         if (S_ISDIR(mode)) {
 648                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 649                         file->dir.depth--;
 650                 if (flags & XMIT_TOP_DIR) {
 651                         in_del_hier = recurse;
 652                         del_hier_name_len = file->dir.depth == 0 ? 0 : l1 + l2;
 653                         if (relative_paths && del_hier_name_len > 2
 654                             && basename_len == 1+1 && *basename == '.')
 655                                 del_hier_name_len -= 2;
 656                         file->flags |= FLAG_TOP_DIR | FLAG_DEL_HERE;
 657                 } else if (in_del_hier) {
 658                         if (!relative_paths || !del_hier_name_len
 659                          || (l1 >= del_hier_name_len
 660                           && thisname[del_hier_name_len] == '/'))
 661                                 file->flags |= FLAG_DEL_HERE;
 662                         else
 663                                 in_del_hier = 0;
 664                 }
 665         }
 666
 667         file->basename = bp;
 668         memcpy(bp, basename, basename_len);
 669         bp += basename_len;
 670
 671         if (preserve_devices && IS_DEVICE(mode))
 672                 file->u.rdev = rdev;
 673
 674 #ifdef SUPPORT_LINKS
 675         if (linkname_len) {
 676                 file->u.link = bp;
 677                 read_sbuf(f, bp, linkname_len - 1);
 678                 if (sanitize_paths)
 679                         sanitize_path(bp, bp, "", lastdir_depth);
 680                 bp += linkname_len;
 681         }
 682 #endif
 683
 684 #ifdef SUPPORT_HARD_LINKS
 685         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 686                 flags |= XMIT_HAS_IDEV_DATA;
 687         if (flags & XMIT_HAS_IDEV_DATA) {
 688                 int64 inode;
 689                 if (protocol_version < 26) {
 690                         dev = read_int(f);
 691                         inode = read_int(f);
 692                 } else {
 693                         if (!(flags & XMIT_SAME_DEV))
 694                                 dev = read_longint(f);
 695                         inode = read_longint(f);
 696                 }
 697                 if (flist->hlink_pool) {
 698                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 699                             struct idev, 1, "inode_table");
 700                         file->F_INODE = inode;
 701                         file->F_DEV = dev;
 702                 }
 703         }
 704 #endif
 705
 706         if (always_checksum && (sum_len || protocol_version < 28)) {
 707                 char *sum;
 708                 int slen = protocol_version < 21 ? 2 : MD4_SUM_LENGTH;
 709                 if (sum_len) {
 710                         file->u.sum = sum = bp;
 711                         /*bp += sum_len;*/
 712                 } else {
 713                         /* Prior to 28, we get a useless set of nulls. */
 714                         sum = empty_sum;
 715                 }
 716                 read_buf(f, sum, slen);
 717         }
 718
 719         if (!preserve_perms) {
 720                 /* set an appropriate set of permissions based on original
 721                  * permissions and umask. This emulates what GNU cp does */
 722                 file->mode &= ~orig_umask;
 723         }
 724
 725         return file;
 726 }
 727
 728
 729 /**
 730  * Create a file_struct for a named file by reading its stat()
 731  * information and performing extensive checks against global
 732  * options.
 733  *
 734  * @return the new file, or NULL if there was an error or this file
 735  * should be excluded.
 736  *
 737  * @todo There is a small optimization opportunity here to avoid
 738  * stat()ing the file in some circumstances, which has a certain cost.
 739  * We are called immediately after doing readdir(), and so we may
 740  * already know the d_type of the file.  We could for example avoid
 741  * statting directories if we're not recursing, but this is not a very
 742  * important case.  Some systems may not have d_type.
 743  **/
 744 struct file_struct *make_file(char *fname, struct file_list *flist,
 745                               int filter_level)
 746 {
 747         static char *lastdir;
 748         static int lastdir_len = -1;
 749         struct file_struct *file;
 750         STRUCT_STAT st;
 751         char sum[SUM_LENGTH];
 752         char thisname[MAXPATHLEN];
 753         char linkname[MAXPATHLEN];
 754         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 755         char *basename, *dirname, *bp;
 756         unsigned short flags = 0;
 757
 758         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 759                 lastdir_len = -1;
 760
 761         if (strlcpy(thisname, fname, sizeof thisname)
 762             >= sizeof thisname - flist_dir_len) {
 763                 rprintf(FINFO, "skipping overly long name: %s\n",
 764                         safe_fname(fname));
 765                 return NULL;
 766         }
 767         clean_fname(thisname, 0);
 768         if (sanitize_paths)
 769                 sanitize_path(thisname, thisname, "", 0);
 770
 771         memset(sum, 0, SUM_LENGTH);
 772
 773         if (readlink_stat(thisname, &st, linkname) != 0) {
 774                 int save_errno = errno;
 775                 /* See if file is excluded before reporting an error. */
 776                 if (filter_level != NO_FILTERS
 777                     && is_excluded(thisname, 0, filter_level))
 778                         return NULL;
 779                 if (save_errno == ENOENT) {
 780 #ifdef SUPPORT_LINKS
 781                         /* Avoid "vanished" error if symlink points nowhere. */
 782                         if (copy_links && do_lstat(thisname, &st) == 0
 783                             && S_ISLNK(st.st_mode)) {
 784                                 io_error |= IOERR_GENERAL;
 785                                 rprintf(FERROR, "symlink has no referent: %s\n",
 786                                         full_fname(thisname));
 787                         } else
 788 #endif
 789                         {
 790                                 enum logcode c = am_daemon && protocol_version < 28
 791                                     ? FERROR : FINFO;
 792                                 io_error |= IOERR_VANISHED;
 793                                 rprintf(c, "file has vanished: %s\n",
 794                                         full_fname(thisname));
 795                         }
 796                 } else {
 797                         io_error |= IOERR_GENERAL;
 798                         rsyserr(FERROR, save_errno, "readlink %s failed",
 799                                 full_fname(thisname));
 800                 }
 801                 return NULL;
 802         }
 803
 804         /* backup.c calls us with filter_level set to NO_FILTERS. */
 805         if (filter_level == NO_FILTERS)
 806                 goto skip_filters;
 807
 808         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
 809                 rprintf(FINFO, "skipping directory %s\n", safe_fname(thisname));
 810                 return NULL;
 811         }
 812
 813         /* We only care about directories because we need to avoid recursing
 814          * into a mount-point directory, not to avoid copying a symlinked
 815          * file if -L (or similar) was specified. */
 816         if (one_file_system && st.st_dev != filesystem_dev
 817             && S_ISDIR(st.st_mode))
 818                 flags |= FLAG_MOUNT_POINT;
 819
 820         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level))
 821                 return NULL;
 822
 823         if (lp_ignore_nonreadable(module_id)) {
 824 #ifdef SUPPORT_LINKS
 825                 if (!S_ISLNK(st.st_mode))
 826 #endif
 827                         if (access(thisname, R_OK) != 0)
 828                                 return NULL;
 829         }
 830
 831 skip_filters:
 832
 833         if (verbose > 2) {
 834                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 835                         who_am_i(), safe_fname(thisname), filter_level);
 836         }
 837
 838         if ((basename = strrchr(thisname, '/')) != NULL) {
 839                 dirname_len = ++basename - thisname; /* counts future '\0' */
 840                 if (lastdir_len == dirname_len - 1
 841                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 842                         dirname = lastdir;
 843                         dirname_len = 0; /* indicates no copy is needed */
 844                 } else
 845                         dirname = thisname;
 846         } else {
 847                 basename = thisname;
 848                 dirname = NULL;
 849                 dirname_len = 0;
 850         }
 851         basename_len = strlen(basename) + 1; /* count the '\0' */
 852
 853 #ifdef SUPPORT_LINKS
 854         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 855 #else
 856         linkname_len = 0;
 857 #endif
 858
 859         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 860
 861         alloc_len = file_struct_len + dirname_len + basename_len
 862             + linkname_len + sum_len;
 863         if (flist) {
 864                 bp = pool_alloc(flist->file_pool, alloc_len,
 865                     "receive_file_entry");
 866         } else {
 867                 if (!(bp = new_array(char, alloc_len)))
 868                         out_of_memory("receive_file_entry");
 869         }
 870
 871         file = (struct file_struct *)bp;
 872         memset(bp, 0, file_struct_len);
 873         bp += file_struct_len;
 874
 875         file->flags = flags;
 876         file->modtime = st.st_mtime;
 877         file->length = st.st_size;
 878         file->mode = st.st_mode;
 879         file->uid = st.st_uid;
 880         file->gid = st.st_gid;
 881
 882 #ifdef SUPPORT_HARD_LINKS
 883         if (flist && flist->hlink_pool) {
 884                 if (protocol_version < 28) {
 885                         if (S_ISREG(st.st_mode))
 886                                 file->link_u.idev = pool_talloc(
 887                                     flist->hlink_pool, struct idev, 1,
 888                                     "inode_table");
 889                 } else {
 890                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 891                                 file->link_u.idev = pool_talloc(
 892                                     flist->hlink_pool, struct idev, 1,
 893                                     "inode_table");
 894                 }
 895         }
 896         if (file->link_u.idev) {
 897                 file->F_DEV = st.st_dev;
 898                 file->F_INODE = st.st_ino;
 899         }
 900 #endif
 901
 902         if (dirname_len) {
 903                 file->dirname = lastdir = bp;
 904                 lastdir_len = dirname_len - 1;
 905                 memcpy(bp, dirname, dirname_len - 1);
 906                 bp += dirname_len;
 907                 bp[-1] = '\0';
 908         } else if (dirname)
 909                 file->dirname = dirname;
 910
 911         file->basename = bp;
 912         memcpy(bp, basename, basename_len);
 913         bp += basename_len;
 914
 915 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 916         if (preserve_devices && IS_DEVICE(st.st_mode))
 917                 file->u.rdev = st.st_rdev;
 918 #endif
 919
 920 #ifdef SUPPORT_LINKS
 921         if (linkname_len) {
 922                 file->u.link = bp;
 923                 memcpy(bp, linkname, linkname_len);
 924                 bp += linkname_len;
 925         }
 926 #endif
 927
 928         if (sum_len) {
 929                 file->u.sum = bp;
 930                 file_checksum(thisname, bp, st.st_size);
 931                 /*bp += sum_len;*/
 932         }
 933
 934         file->dir.root = flist_dir;
 935
 936         /* This code is only used by the receiver when it is building
 937          * a list of files for a delete pass. */
 938         if (keep_dirlinks && linkname_len && flist) {
 939                 STRUCT_STAT st2;
 940                 int save_mode = file->mode;
 941                 file->mode = S_IFDIR; /* find a directory w/our name */
 942                 if (flist_find(the_file_list, file) >= 0
 943                     && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
 944                         file->modtime = st2.st_mtime;
 945                         file->length = st2.st_size;
 946                         file->mode = st2.st_mode;
 947                         file->uid = st2.st_uid;
 948                         file->gid = st2.st_gid;
 949                         file->u.link = NULL;
 950                 } else
 951                         file->mode = save_mode;
 952         }
 953
 954         if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
 955                 stats.total_size += st.st_size;
 956
 957         return file;
 958 }
 959
 960
 961 static struct file_struct *send_file_name(int f, struct file_list *flist,
 962                                           char *fname, unsigned short base_flags)
 963 {
 964         struct file_struct *file;
 965
 966         file = make_file(fname, flist, f == -2 ? SERVER_FILTERS : ALL_FILTERS);
 967         if (!file)
 968                 return NULL;
 969
 970         maybe_emit_filelist_progress(flist->count + flist_count_offset);
 971
 972         flist_expand(flist);
 973
 974         if (file->basename[0]) {
 975                 flist->files[flist->count++] = file;
 976                 send_file_entry(file, f, base_flags);
 977         }
 978         return file;
 979 }
 980
 981 static void send_if_directory(int f, struct file_list *flist,
 982                               struct file_struct *file)
 983 {
 984         char fbuf[MAXPATHLEN];
 985
 986         if (S_ISDIR(file->mode)
 987             && !(file->flags & FLAG_MOUNT_POINT) && f_name_to(file, fbuf)) {
 988                 void *save_filters;
 989                 unsigned int len = strlen(fbuf);
 990                 if (len > 1 && fbuf[len-1] == '/')
 991                         fbuf[--len] = '\0';
 992                 if (len >= MAXPATHLEN - 1) {
 993                         io_error |= IOERR_GENERAL;
 994                         rprintf(FERROR, "skipping long-named directory: %s\n",
 995                                 full_fname(fbuf));
 996                         return;
 997                 }
 998                 save_filters = push_local_filters(fbuf, len);
 999                 send_directory(f, flist, fbuf, len);
1000                 pop_local_filters(save_filters);
1001         }
1002 }
1003
1004
1005 /* This function is normally called by the sender, but the receiving side also
1006  * calls it from get_dirlist() with f set to -1 so that we just construct the
1007  * file list in memory without sending it over the wire.  Also, get_dirlist()
1008  * might call this with f set to -2, which also indicates that local filter
1009  * rules should be ignored. */
1010 static void send_directory(int f, struct file_list *flist,
1011                            char *fbuf, int len)
1012 {
1013         struct dirent *di;
1014         unsigned remainder;
1015         char *p;
1016         DIR *d;
1017         int start = flist->count;
1018
1019         if (!(d = opendir(fbuf))) {
1020                 io_error |= IOERR_GENERAL;
1021                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1022                 return;
1023         }
1024
1025         p = fbuf + len;
1026         if (len != 1 || *fbuf != '/')
1027                 *p++ = '/';
1028         *p = '\0';
1029         remainder = MAXPATHLEN - (p - fbuf);
1030
1031         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1032                 char *dname = d_name(di);
1033                 if (dname[0] == '.' && (dname[1] == '\0'
1034                     || (dname[1] == '.' && dname[2] == '\0')))
1035                         continue;
1036                 if (strlcpy(p, dname, remainder) < remainder)
1037                         send_file_name(f, flist, fbuf, 0);
1038                 else {
1039                         io_error |= IOERR_GENERAL;
1040                         rprintf(FINFO,
1041                                 "cannot send long-named file %s\n",
1042                                 full_fname(fbuf));
1043                 }
1044         }
1045
1046         fbuf[len] = '\0';
1047
1048         if (errno) {
1049                 io_error |= IOERR_GENERAL;
1050                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1051         }
1052
1053         closedir(d);
1054
1055         if (recurse) {
1056                 int i, end = flist->count - 1;
1057                 for (i = start; i <= end; i++)
1058                         send_if_directory(f, flist, flist->files[i]);
1059         }
1060 }
1061
1062
1063 struct file_list *send_file_list(int f, int argc, char *argv[])
1064 {
1065         int l;
1066         STRUCT_STAT st;
1067         char *p, *dir, olddir[sizeof curr_dir];
1068         char lastpath[MAXPATHLEN] = "";
1069         struct file_list *flist;
1070         struct timeval start_tv, end_tv;
1071         int64 start_write;
1072         int use_ff_fd = 0;
1073
1074         if (show_filelist_p())
1075                 start_filelist_progress("building file list");
1076
1077         start_write = stats.total_written;
1078         gettimeofday(&start_tv, NULL);
1079
1080         flist = flist_new(WITH_HLINK, "send_file_list");
1081
1082         io_start_buffering_out();
1083         if (filesfrom_fd >= 0) {
1084                 if (argv[0] && !push_dir(argv[0])) {
1085                         rsyserr(FERROR, errno, "push_dir %s failed",
1086                                 full_fname(argv[0]));
1087                         exit_cleanup(RERR_FILESELECT);
1088                 }
1089                 use_ff_fd = 1;
1090         }
1091
1092         while (1) {
1093                 char fname2[MAXPATHLEN];
1094                 char *fname = fname2;
1095                 int is_dot_dir;
1096
1097                 if (use_ff_fd) {
1098                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1099                                 break;
1100                         sanitize_path(fname, fname, "", 0);
1101                 } else {
1102                         if (argc-- == 0)
1103                                 break;
1104                         strlcpy(fname, *argv++, MAXPATHLEN);
1105                         if (sanitize_paths)
1106                                 sanitize_path(fname, fname, "", 0);
1107                 }
1108
1109                 l = strlen(fname);
1110                 if (!l || fname[l - 1] == '/') {
1111                         if (l == 2 && fname[0] == '.') {
1112                                 /* Turn "./" into just "." rather than "./." */
1113                                 fname[1] = '\0';
1114                         } else {
1115                                 if (l + 1 >= MAXPATHLEN)
1116                                         overflow_exit("send_file_list");
1117                                 fname[l++] = '.';
1118                                 fname[l] = '\0';
1119                         }
1120                         is_dot_dir = 1;
1121                 } else if (l > 1 && fname[l-1] == '.' && fname[l-2] == '.'
1122                     && (l == 2 || fname[l-3] == '/')) {
1123                         if (l + 2 >= MAXPATHLEN)
1124                                 overflow_exit("send_file_list");
1125                         fname[l++] = '/';
1126                         fname[l++] = '.';
1127                         fname[l] = '\0';
1128                         is_dot_dir = 1;
1129                 } else {
1130                         is_dot_dir = fname[l-1] == '.'
1131                                    && (l == 1 || fname[l-2] == '/');
1132                 }
1133
1134                 if (link_stat(fname, &st, keep_dirlinks) != 0) {
1135                         io_error |= IOERR_GENERAL;
1136                         rsyserr(FERROR, errno, "link_stat %s failed",
1137                                 full_fname(fname));
1138                         continue;
1139                 }
1140
1141                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1142                         rprintf(FINFO, "skipping directory %s\n",
1143                                 safe_fname(fname));
1144                         continue;
1145                 }
1146
1147                 dir = NULL;
1148                 olddir[0] = '\0';
1149
1150                 if (!relative_paths) {
1151                         p = strrchr(fname, '/');
1152                         if (p) {
1153                                 *p = '\0';
1154                                 if (p == fname)
1155                                         dir = "/";
1156                                 else
1157                                         dir = fname;
1158                                 fname = p + 1;
1159                         }
1160                 } else if ((p = strstr(fname, "/./")) != NULL) {
1161                         *p = '\0';
1162                         if (p == fname)
1163                                 dir = "/";
1164                         else
1165                                 dir = fname;
1166                         fname = p + 3;
1167                 }
1168
1169                 if (!*fname)
1170                         fname = ".";
1171
1172                 if (dir && *dir) {
1173                         static char *lastdir;
1174                         static int lastdir_len;
1175
1176                         strlcpy(olddir, curr_dir, sizeof olddir);
1177
1178                         if (!push_dir(dir)) {
1179                                 io_error |= IOERR_GENERAL;
1180                                 rsyserr(FERROR, errno, "push_dir %s failed",
1181                                         full_fname(dir));
1182                                 continue;
1183                         }
1184
1185                         if (lastdir && strcmp(lastdir, dir) == 0) {
1186                                 flist_dir = lastdir;
1187                                 flist_dir_len = lastdir_len;
1188                         } else {
1189                                 flist_dir = lastdir = strdup(dir);
1190                                 flist_dir_len = lastdir_len = strlen(dir);
1191                         }
1192                 }
1193
1194                 if (implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1195                         /* Send the implied directories at the start of the
1196                          * source spec, so we get their permissions right. */
1197                         char *lp = lastpath, *fn = fname, *slash = fname;
1198                         *p = '\0';
1199                         /* Skip any initial directories in our path that we
1200                          * have in common with lastpath. */
1201                         while (*fn && *lp == *fn) {
1202                                 if (*fn == '/')
1203                                         slash = fn;
1204                                 lp++, fn++;
1205                         }
1206                         *p = '/';
1207                         if (fn != p || (*lp && *lp != '/')) {
1208                                 int save_copy_links = copy_links;
1209                                 int save_xfer_dirs = xfer_dirs;
1210                                 copy_links = copy_unsafe_links;
1211                                 xfer_dirs = 1;
1212                                 while ((slash = strchr(slash+1, '/')) != 0) {
1213                                         *slash = '\0';
1214                                         send_file_name(f, flist, fname, 0);
1215                                         *slash = '/';
1216                                 }
1217                                 copy_links = save_copy_links;
1218                                 xfer_dirs = save_xfer_dirs;
1219                                 *p = '\0';
1220                                 strlcpy(lastpath, fname, sizeof lastpath);
1221                                 *p = '/';
1222                         }
1223                 }
1224
1225                 if (one_file_system)
1226                         filesystem_dev = st.st_dev;
1227
1228                 if (recurse || (xfer_dirs && is_dot_dir)) {
1229                         struct file_struct *file;
1230                         if ((file = send_file_name(f, flist, fname, XMIT_TOP_DIR)))
1231                                 send_if_directory(f, flist, file);
1232                 } else
1233                         send_file_name(f, flist, fname, 0);
1234
1235                 if (olddir[0]) {
1236                         flist_dir = NULL;
1237                         flist_dir_len = 0;
1238                         if (!pop_dir(olddir)) {
1239                                 rsyserr(FERROR, errno, "pop_dir %s failed",
1240                                         full_fname(olddir));
1241                                 exit_cleanup(RERR_FILESELECT);
1242                         }
1243                 }
1244         }
1245
1246         gettimeofday(&end_tv, NULL);
1247         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1248                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1249         if (stats.flist_buildtime == 0)
1250                 stats.flist_buildtime = 1;
1251         start_tv = end_tv;
1252
1253         send_file_entry(NULL, f, 0);
1254
1255         if (show_filelist_p())
1256                 finish_filelist_progress(flist);
1257
1258         gettimeofday(&end_tv, NULL);
1259         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1260                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1261
1262         if (flist->hlink_pool) {
1263                 pool_destroy(flist->hlink_pool);
1264                 flist->hlink_pool = NULL;
1265         }
1266
1267         /* Sort the list without removing any duplicates.  This allows the
1268          * receiving side to ask for any name they like, which gives us the
1269          * flexibility to change the way we unduplicate names in the future
1270          * without causing a compatibility problem with older versions. */
1271         clean_flist(flist, 0, 0);
1272
1273         /* Now send the uid/gid list. This was introduced in
1274          * protocol version 15 */
1275         send_uid_list(f);
1276
1277         /* send the io_error flag */
1278         write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1279
1280         io_end_buffering();
1281         stats.flist_size = stats.total_written - start_write;
1282         stats.num_files = flist->count;
1283
1284         if (verbose > 3)
1285                 output_flist(flist);
1286
1287         if (verbose > 2)
1288                 rprintf(FINFO, "send_file_list done\n");
1289
1290         return flist;
1291 }
1292
1293
1294 struct file_list *recv_file_list(int f)
1295 {
1296         struct file_list *flist;
1297         unsigned short flags;
1298         int64 start_read;
1299
1300         if (show_filelist_p())
1301                 start_filelist_progress("receiving file list");
1302
1303         start_read = stats.total_read;
1304
1305         flist = flist_new(WITH_HLINK, "recv_file_list");
1306
1307         flist->count = 0;
1308         flist->malloced = 1000;
1309         flist->files = new_array(struct file_struct *, flist->malloced);
1310         if (!flist->files)
1311                 goto oom;
1312
1313
1314         while ((flags = read_byte(f)) != 0) {
1315                 struct file_struct *file;
1316
1317                 flist_expand(flist);
1318
1319                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1320                         flags |= read_byte(f) << 8;
1321                 file = receive_file_entry(flist, flags, f);
1322
1323                 if (S_ISREG(file->mode))
1324                         stats.total_size += file->length;
1325
1326                 flist->files[flist->count++] = file;
1327
1328                 maybe_emit_filelist_progress(flist->count);
1329
1330                 if (verbose > 2) {
1331                         rprintf(FINFO, "recv_file_name(%s)\n",
1332                                 safe_fname(f_name(file)));
1333                 }
1334         }
1335         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1336
1337         if (verbose > 2)
1338                 rprintf(FINFO, "received %d names\n", flist->count);
1339
1340         if (show_filelist_p())
1341                 finish_filelist_progress(flist);
1342
1343         clean_flist(flist, relative_paths, 1);
1344
1345         if (f >= 0) {
1346                 /* Now send the uid/gid list. This was introduced in
1347                  * protocol version 15 */
1348                 recv_uid_list(f, flist);
1349
1350                 /* Recv the io_error flag */
1351                 if (lp_ignore_errors(module_id) || ignore_errors)
1352                         read_int(f);
1353                 else
1354                         io_error |= read_int(f);
1355         }
1356
1357         if (verbose > 3)
1358                 output_flist(flist);
1359
1360         if (list_only) {
1361                 int i;
1362                 for (i = 0; i < flist->count; i++)
1363                         list_file_entry(flist->files[i]);
1364         }
1365
1366         if (verbose > 2)
1367                 rprintf(FINFO, "recv_file_list done\n");
1368
1369         stats.flist_size = stats.total_read - start_read;
1370         stats.num_files = flist->count;
1371
1372         return flist;
1373
1374 oom:
1375         out_of_memory("recv_file_list");
1376         return NULL;            /* not reached */
1377 }
1378
1379
1380 static int file_compare(struct file_struct **file1, struct file_struct **file2)
1381 {
1382         return f_name_cmp(*file1, *file2);
1383 }
1384
1385
1386 /* Search for an identically-named item in the file list.  Note that the
1387  * items must agree in their directory-ness, or no match is returned. */
1388 int flist_find(struct file_list *flist, struct file_struct *f)
1389 {
1390         int low = flist->low, high = flist->high;
1391         int ret, mid, mid_up;
1392
1393         while (low <= high) {
1394                 mid = (low + high) / 2;
1395                 for (mid_up = mid; !flist->files[mid_up]->basename; mid_up++) {}
1396                 if (mid_up <= high)
1397                         ret = f_name_cmp(flist->files[mid_up], f);
1398                 else
1399                         ret = 1;
1400                 if (ret == 0) {
1401                         if (protocol_version < 29
1402                             && S_ISDIR(flist->files[mid_up]->mode)
1403                             != S_ISDIR(f->mode))
1404                                 return -1;
1405                         return mid_up;
1406                 }
1407                 if (ret > 0)
1408                         high = mid - 1;
1409                 else
1410                         low = mid_up + 1;
1411         }
1412         return -1;
1413 }
1414
1415
1416 /*
1417  * Free up any resources a file_struct has allocated
1418  * and clear the file.
1419  */
1420 void clear_file(int i, struct file_list *flist)
1421 {
1422         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1423                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1424         memset(flist->files[i], 0, file_struct_len);
1425 }
1426
1427
1428 /*
1429  * allocate a new file list
1430  */
1431 struct file_list *flist_new(int with_hlink, char *msg)
1432 {
1433         struct file_list *flist;
1434
1435         flist = new(struct file_list);
1436         if (!flist)
1437                 out_of_memory(msg);
1438
1439         memset(flist, 0, sizeof (struct file_list));
1440
1441         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1442             out_of_memory, POOL_INTERN)))
1443                 out_of_memory(msg);
1444
1445 #ifdef SUPPORT_HARD_LINKS
1446         if (with_hlink && preserve_hard_links) {
1447                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1448                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1449                         out_of_memory(msg);
1450         }
1451 #endif
1452
1453         return flist;
1454 }
1455
1456 /*
1457  * free up all elements in a flist
1458  */
1459 void flist_free(struct file_list *flist)
1460 {
1461         pool_destroy(flist->file_pool);
1462         pool_destroy(flist->hlink_pool);
1463         free(flist->files);
1464         free(flist);
1465 }
1466
1467
1468 /*
1469  * This routine ensures we don't have any duplicate names in our file list.
1470  * duplicate names can cause corruption because of the pipelining
1471  */
1472 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1473 {
1474         int i, prev_i = 0;
1475
1476         if (!flist)
1477                 return;
1478         if (flist->count == 0) {
1479                 flist->high = -1;
1480                 return;
1481         }
1482
1483         sorting_flist = flist;
1484         qsort(flist->files, flist->count,
1485             sizeof flist->files[0], (int (*)())file_compare);
1486         sorting_flist = NULL;
1487
1488         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1489                 if (flist->files[i]->basename) {
1490                         prev_i = i;
1491                         break;
1492                 }
1493         }
1494         flist->low = prev_i;
1495         while (++i < flist->count) {
1496                 int j;
1497                 struct file_struct *file = flist->files[i];
1498
1499                 if (!file->basename)
1500                         continue;
1501                 if (f_name_cmp(file, flist->files[prev_i]) == 0)
1502                         j = prev_i;
1503                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
1504                         int save_mode = file->mode;
1505                         /* Make sure that this directory doesn't duplicate a
1506                          * non-directory earlier in the list. */
1507                         flist->high = prev_i;
1508                         file->mode = S_IFREG;
1509                         j = flist_find(flist, file);
1510                         file->mode = save_mode;
1511                 } else
1512                         j = -1;
1513                 if (j >= 0) {
1514                         struct file_struct *fp = flist->files[j];
1515                         int keep, drop;
1516                         /* If one is a dir and the other is not, we want to
1517                          * keep the dir because it might have contents in the
1518                          * list. */
1519                         if (S_ISDIR(file->mode) != S_ISDIR(fp->mode)) {
1520                                 if (S_ISDIR(file->mode))
1521                                         keep = i, drop = j;
1522                                 else
1523                                         keep = j, drop = i;
1524                         } else
1525                                 keep = j, drop = i;
1526                         if (verbose > 1 && !am_server) {
1527                                 rprintf(FINFO,
1528                                         "removing duplicate name %s from file list (%d)\n",
1529                                         safe_fname(f_name(file)), drop);
1530                         }
1531                         /* Make sure that if we unduplicate '.', that we don't
1532                          * lose track of a user-specified top directory. */
1533                         flist->files[keep]->flags |= flist->files[drop]->flags
1534                                                    & (FLAG_TOP_DIR|FLAG_DEL_HERE);
1535
1536                         clear_file(drop, flist);
1537
1538                         if (keep == i) {
1539                                 if (flist->low == drop) {
1540                                         for (j = drop + 1;
1541                                              j < i && !flist->files[j]->basename;
1542                                              j++) {}
1543                                         flist->low = j;
1544                                 }
1545                                 prev_i = i;
1546                         }
1547                 } else
1548                         prev_i = i;
1549         }
1550         flist->high = no_dups ? prev_i : flist->count - 1;
1551
1552         if (strip_root) {
1553                 /* We need to strip off the leading slashes for relative
1554                  * paths, but this must be done _after_ the sorting phase. */
1555                 for (i = flist->low; i <= flist->high; i++) {
1556                         struct file_struct *file = flist->files[i];
1557
1558                         if (!file->dirname)
1559                                 continue;
1560                         if (*file->dirname == '/') {
1561                                 char *s = file->dirname + 1;
1562                                 while (*s == '/') s++;
1563                                 memmove(file->dirname, s, strlen(s) + 1);
1564                         }
1565
1566                         if (!*file->dirname)
1567                                 file->dirname = NULL;
1568                 }
1569         }
1570 }
1571
1572
1573 static void output_flist(struct file_list *flist)
1574 {
1575         char uidbuf[16], gidbuf[16], depthbuf[16];
1576         struct file_struct *file;
1577         const char *who = who_am_i();
1578         int i;
1579
1580         for (i = 0; i < flist->count; i++) {
1581                 file = flist->files[i];
1582                 if ((am_root || am_sender) && preserve_uid)
1583                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1584                 else
1585                         *uidbuf = '\0';
1586                 if (preserve_gid && file->gid != GID_NONE)
1587                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1588                 else
1589                         *gidbuf = '\0';
1590                 if (!am_sender)
1591                         sprintf(depthbuf, "%d", file->dir.depth);
1592                 rprintf(FINFO, "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
1593                         who, i, am_sender ? NS(file->dir.root) : depthbuf,
1594                         file->dirname ? safe_fname(file->dirname) : "",
1595                         file->dirname ? "/" : "", NS(file->basename),
1596                         S_ISDIR(file->mode) ? "/" : "", (int)file->mode,
1597                         (double)file->length, uidbuf, gidbuf, file->flags);
1598         }
1599 }
1600
1601
1602 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
1603 enum fnc_type { t_PATH, t_ITEM };
1604
1605 /* Compare the names of two file_struct entities, similar to how strcmp()
1606  * would do if it were operating on the joined strings.
1607  *
1608  * Some differences beginning with protocol_version 29: (1) directory names
1609  * are compared with an assumed trailing slash so that they compare in a
1610  * way that would cause them to sort immediately prior to any content they
1611  * may have; (2) a directory of any name compares after a non-directory of
1612  * any name at the same depth; (3) a directory with name "." compares prior
1613  * to anything else.  These changes mean that a directory and a non-dir
1614  * with the same name will not compare as equal (protocol_version >= 29).
1615  *
1616  * The dirname component can be an empty string, but the basename component
1617  * cannot (and never is in the current codebase).  The basename component
1618  * may be NULL (for a removed item), in which case it is considered to be
1619  * after any existing item. */
1620 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1621 {
1622         int dif;
1623         const uchar *c1, *c2;
1624         enum fnc_state state1, state2;
1625         enum fnc_type type1, type2;
1626         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
1627
1628         if (!f1 || !f1->basename) {
1629                 if (!f2 || !f2->basename)
1630                         return 0;
1631                 return -1;
1632         }
1633         if (!f2 || !f2->basename)
1634                 return 1;
1635
1636         c1 = (uchar*)f1->dirname;
1637         c2 = (uchar*)f2->dirname;
1638         if (c1 == c2)
1639                 c1 = c2 = NULL;
1640         if (!c1) {
1641                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1642                 c1 = (uchar*)f1->basename;
1643                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1644                         type1 = t_ITEM;
1645                         state1 = s_TRAILING;
1646                         c1 = (uchar*)"";
1647                 } else
1648                         state1 = s_BASE;
1649         } else if (!*c1) {
1650                 type1 = t_path;
1651                 state1 = s_SLASH;
1652                 c1 = (uchar*)"/";
1653         } else {
1654                 type1 = t_path;
1655                 state1 = s_DIR;
1656         }
1657         if (!c2) {
1658                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1659                 c2 = (uchar*)f2->basename;
1660                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1661                         type2 = t_ITEM;
1662                         state2 = s_TRAILING;
1663                         c2 = (uchar*)"";
1664                 } else
1665                         state2 = s_BASE;
1666         } else if (!*c2) {
1667                 type2 = t_path;
1668                 state2 = s_SLASH;
1669                 c2 = (uchar*)"/";
1670         } else {
1671                 type2 = t_path;
1672                 state2 = s_DIR;
1673         }
1674
1675         if (type1 != type2)
1676                 return type1 == t_PATH ? 1 : -1;
1677
1678         while (1) {
1679                 if ((dif = (int)*c1++ - (int)*c2++) != 0)
1680                         break;
1681                 if (!*c1) {
1682                         switch (state1) {
1683                         case s_DIR:
1684                                 state1 = s_SLASH;
1685                                 c1 = (uchar*)"/";
1686                                 break;
1687                         case s_SLASH:
1688                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1689                                 c1 = (uchar*)f1->basename;
1690                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1691                                         type1 = t_ITEM;
1692                                         state1 = s_TRAILING;
1693                                         c1 = (uchar*)"";
1694                                 } else
1695                                         state1 = s_BASE;
1696                                 break;
1697                         case s_BASE:
1698                                 state1 = s_TRAILING;
1699                                 if (type1 == t_PATH) {
1700                                         c1 = (uchar*)"/";
1701                                         break;
1702                                 }
1703                                 /* FALL THROUGH */
1704                         case s_TRAILING:
1705                                 type1 = t_ITEM;
1706                                 break;
1707                         }
1708                         if (*c2 && type1 != type2)
1709                                 return type1 == t_PATH ? 1 : -1;
1710                 }
1711                 if (!*c2) {
1712                         switch (state2) {
1713                         case s_DIR:
1714                                 state2 = s_SLASH;
1715                                 c2 = (uchar*)"/";
1716                                 break;
1717                         case s_SLASH:
1718                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1719                                 c2 = (uchar*)f2->basename;
1720                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1721                                         type2 = t_ITEM;
1722                                         state2 = s_TRAILING;
1723                                         c2 = (uchar*)"";
1724                                 } else
1725                                         state2 = s_BASE;
1726                                 break;
1727                         case s_BASE:
1728                                 state2 = s_TRAILING;
1729                                 if (type2 == t_PATH) {
1730                                         c2 = (uchar*)"/";
1731                                         break;
1732                                 }
1733                                 /* FALL THROUGH */
1734                         case s_TRAILING:
1735                                 if (!*c1)
1736                                         return 0;
1737                                 type2 = t_ITEM;
1738                                 break;
1739                         }
1740                         if (type1 != type2)
1741                                 return type1 == t_PATH ? 1 : -1;
1742                 }
1743         }
1744
1745         return dif;
1746 }
1747
1748
1749 /* Return a copy of the full filename of a flist entry, using the indicated
1750  * buffer.  No size-checking is done because we checked the size when creating
1751  * the file_struct entry.
1752  */
1753 char *f_name_to(struct file_struct *f, char *fbuf)
1754 {
1755         if (!f || !f->basename)
1756                 return NULL;
1757
1758         if (f->dirname) {
1759                 int len = strlen(f->dirname);
1760                 memcpy(fbuf, f->dirname, len);
1761                 fbuf[len] = '/';
1762                 strcpy(fbuf + len + 1, f->basename);
1763         } else
1764                 strcpy(fbuf, f->basename);
1765         return fbuf;
1766 }
1767
1768
1769 /* Like f_name_to(), but we rotate through 5 static buffers of our own. */
1770 char *f_name(struct file_struct *f)
1771 {
1772         static char names[5][MAXPATHLEN];
1773         static unsigned int n;
1774
1775         n = (n + 1) % (sizeof names / sizeof names[0]);
1776
1777         return f_name_to(f, names[n]);
1778 }
1779
1780
1781 /* Do a non-recursive scan of the named directory, possibly ignoring all
1782  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
1783  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
1784  * buffer (the functions we call will append names onto the end, but the old
1785  * dir value will be restored on exit). */
1786 struct file_list *get_dirlist(char *dirname, int dlen,
1787                               int ignore_filter_rules)
1788 {
1789         struct file_list *dirlist;
1790         char dirbuf[MAXPATHLEN];
1791         int save_recurse = recurse;
1792
1793         if (dlen < 0) {
1794                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
1795                 if (dlen >= MAXPATHLEN)
1796                         return NULL;
1797                 dirname = dirbuf;
1798         }
1799
1800         dirlist = flist_new(WITHOUT_HLINK, "get_dirlist");
1801
1802         recurse = 0;
1803         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen);
1804         recurse = save_recurse;
1805         if (do_progress)
1806                 flist_count_offset += dirlist->count;
1807
1808         clean_flist(dirlist, 0, 0);
1809
1810         if (verbose > 3)
1811                 output_flist(dirlist);
1812
1813         return dirlist;
1814 }