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) && !S_ISDIR(mode))
 418                         flags |= XMIT_TOP_DIR;
 419                 if (!(flags & 0xFF))
 420                         flags |= XMIT_LONG_NAME;
 421                 write_byte(f, flags);
 422         }
 423         if (flags & XMIT_SAME_NAME)
 424                 write_byte(f, l1);
 425         if (flags & XMIT_LONG_NAME)
 426                 write_int(f, l2);
 427         else
 428                 write_byte(f, l2);
 429         write_buf(f, fname + l1, l2);
 430
 431         write_longint(f, file->length);
 432         if (!(flags & XMIT_SAME_TIME))
 433                 write_int(f, modtime);
 434         if (!(flags & XMIT_SAME_MODE))
 435                 write_int(f, to_wire_mode(mode));
 436         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 437                 if (!numeric_ids)
 438                         add_uid(uid);
 439                 write_int(f, uid);
 440         }
 441         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 442                 if (!numeric_ids)
 443                         add_gid(gid);
 444                 write_int(f, gid);
 445         }
 446         if (preserve_devices && IS_DEVICE(mode)) {
 447                 if (protocol_version < 28) {
 448                         if (!(flags & XMIT_SAME_RDEV_pre28))
 449                                 write_int(f, (int)rdev);
 450                 } else {
 451                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 452                                 write_int(f, major(rdev));
 453                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 454                                 write_byte(f, minor(rdev));
 455                         else
 456                                 write_int(f, minor(rdev));
 457                 }
 458         }
 459
 460 #ifdef SUPPORT_LINKS
 461         if (preserve_links && S_ISLNK(mode)) {
 462                 int len = strlen(file->u.link);
 463                 write_int(f, len);
 464                 write_buf(f, file->u.link, len);
 465         }
 466 #endif
 467
 468 #ifdef SUPPORT_HARD_LINKS
 469         if (flags & XMIT_HAS_IDEV_DATA) {
 470                 if (protocol_version < 26) {
 471                         /* 32-bit dev_t and ino_t */
 472                         write_int(f, dev);
 473                         write_int(f, file->F_INODE);
 474                 } else {
 475                         /* 64-bit dev_t and ino_t */
 476                         if (!(flags & XMIT_SAME_DEV))
 477                                 write_longint(f, dev);
 478                         write_longint(f, file->F_INODE);
 479                 }
 480         }
 481 #endif
 482
 483         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 484                 char *sum;
 485                 int slen = protocol_version < 21 ? 2 : MD4_SUM_LENGTH;
 486                 if (S_ISREG(mode))
 487                         sum = file->u.sum;
 488                 else {
 489                         /* Prior to 28, we sent a useless set of nulls. */
 490                         sum = empty_sum;
 491                 }
 492                 write_buf(f, sum, slen);
 493         }
 494
 495         strlcpy(lastname, fname, MAXPATHLEN);
 496
 497         io_write_phase = "unknown";
 498 }
 499
 500
 501
 502 static struct file_struct *receive_file_entry(struct file_list *flist,
 503                                               unsigned short flags, int f)
 504 {
 505         static time_t modtime;
 506         static mode_t mode;
 507         static int64 dev;
 508         static dev_t rdev;
 509         static uint32 rdev_major;
 510         static uid_t uid;
 511         static gid_t gid;
 512         static char lastname[MAXPATHLEN], *lastdir;
 513         static int lastdir_depth, lastdir_len = -1;
 514         static unsigned int del_hier_name_len = 0;
 515         static int in_del_hier = 0;
 516         char thisname[MAXPATHLEN];
 517         unsigned int l1 = 0, l2 = 0;
 518         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 519         OFF_T file_length;
 520         char *basename, *dirname, *bp;
 521         struct file_struct *file;
 522
 523         if (!flist) {
 524                 modtime = 0, mode = 0;
 525                 dev = 0, rdev = makedev(0, 0);
 526                 rdev_major = 0;
 527                 uid = 0, gid = 0;
 528                 *lastname = '\0';
 529                 lastdir_len = -1;
 530                 in_del_hier = 0;
 531                 return NULL;
 532         }
 533
 534         if (flags & XMIT_SAME_NAME)
 535                 l1 = read_byte(f);
 536
 537         if (flags & XMIT_LONG_NAME)
 538                 l2 = read_int(f);
 539         else
 540                 l2 = read_byte(f);
 541
 542         if (l2 >= MAXPATHLEN - l1) {
 543                 rprintf(FERROR,
 544                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 545                         flags, l1, l2, safe_fname(lastname));
 546                 overflow_exit("receive_file_entry");
 547         }
 548
 549         strlcpy(thisname, lastname, l1 + 1);
 550         read_sbuf(f, &thisname[l1], l2);
 551         thisname[l1 + l2] = 0;
 552
 553         strlcpy(lastname, thisname, MAXPATHLEN);
 554
 555         clean_fname(thisname, 0);
 556
 557         if (sanitize_paths)
 558                 sanitize_path(thisname, thisname, "", 0);
 559
 560         if ((basename = strrchr(thisname, '/')) != NULL) {
 561                 dirname_len = ++basename - thisname; /* counts future '\0' */
 562                 if (lastdir_len == dirname_len - 1
 563                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 564                         dirname = lastdir;
 565                         dirname_len = 0; /* indicates no copy is needed */
 566                 } else
 567                         dirname = thisname;
 568         } else {
 569                 basename = thisname;
 570                 dirname = NULL;
 571                 dirname_len = 0;
 572         }
 573         basename_len = strlen(basename) + 1; /* count the '\0' */
 574
 575         file_length = read_longint(f);
 576         if (!(flags & XMIT_SAME_TIME))
 577                 modtime = (time_t)read_int(f);
 578         if (!(flags & XMIT_SAME_MODE))
 579                 mode = from_wire_mode(read_int(f));
 580
 581         if (preserve_uid && !(flags & XMIT_SAME_UID))
 582                 uid = (uid_t)read_int(f);
 583         if (preserve_gid && !(flags & XMIT_SAME_GID))
 584                 gid = (gid_t)read_int(f);
 585
 586         if (preserve_devices) {
 587                 if (protocol_version < 28) {
 588                         if (IS_DEVICE(mode)) {
 589                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 590                                         rdev = (dev_t)read_int(f);
 591                         } else
 592                                 rdev = makedev(0, 0);
 593                 } else if (IS_DEVICE(mode)) {
 594                         uint32 rdev_minor;
 595                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 596                                 rdev_major = read_int(f);
 597                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 598                                 rdev_minor = read_byte(f);
 599                         else
 600                                 rdev_minor = read_int(f);
 601                         rdev = makedev(rdev_major, rdev_minor);
 602                 }
 603         }
 604
 605 #ifdef SUPPORT_LINKS
 606         if (preserve_links && S_ISLNK(mode)) {
 607                 linkname_len = read_int(f) + 1; /* count the '\0' */
 608                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 609                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 610                                 linkname_len - 1);
 611                         overflow_exit("receive_file_entry");
 612                 }
 613         }
 614         else
 615 #endif
 616                 linkname_len = 0;
 617
 618         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 619
 620         alloc_len = file_struct_len + dirname_len + basename_len
 621                   + linkname_len + sum_len;
 622         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 623
 624         file = (struct file_struct *)bp;
 625         memset(bp, 0, file_struct_len);
 626         bp += file_struct_len;
 627
 628         file->flags = 0;
 629         file->modtime = modtime;
 630         file->length = file_length;
 631         file->mode = mode;
 632         file->uid = uid;
 633         file->gid = gid;
 634
 635         if (dirname_len) {
 636                 file->dirname = lastdir = bp;
 637                 lastdir_len = dirname_len - 1;
 638                 memcpy(bp, dirname, dirname_len - 1);
 639                 bp += dirname_len;
 640                 bp[-1] = '\0';
 641                 lastdir_depth = count_dir_elements(lastdir);
 642                 file->dir.depth = lastdir_depth + 1;
 643         } else if (dirname) {
 644                 file->dirname = dirname; /* we're reusing lastname */
 645                 file->dir.depth = lastdir_depth + 1;
 646         } else
 647                 file->dir.depth = 1;
 648
 649         if (S_ISDIR(mode)) {
 650                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 651                         file->dir.depth--;
 652                 if (flags & XMIT_TOP_DIR) {
 653                         in_del_hier = 1;
 654                         del_hier_name_len = file->dir.depth == 0 ? 0 : l1 + l2;
 655                         if (relative_paths && del_hier_name_len > 2
 656                             && basename_len == 1+1 && *basename == '.')
 657                                 del_hier_name_len -= 2;
 658                         file->flags |= FLAG_TOP_DIR | FLAG_DEL_HERE;
 659                 } else if (in_del_hier) {
 660                         if (!relative_paths || !del_hier_name_len
 661                          || (l1 >= del_hier_name_len
 662                           && thisname[del_hier_name_len] == '/'))
 663                                 file->flags |= FLAG_DEL_HERE;
 664                         else
 665                                 in_del_hier = 0;
 666                 }
 667         }
 668
 669         file->basename = bp;
 670         memcpy(bp, basename, basename_len);
 671         bp += basename_len;
 672
 673         if (preserve_devices && IS_DEVICE(mode))
 674                 file->u.rdev = rdev;
 675
 676 #ifdef SUPPORT_LINKS
 677         if (linkname_len) {
 678                 file->u.link = bp;
 679                 read_sbuf(f, bp, linkname_len - 1);
 680                 if (sanitize_paths)
 681                         sanitize_path(bp, bp, "", lastdir_depth);
 682                 bp += linkname_len;
 683         }
 684 #endif
 685
 686 #ifdef SUPPORT_HARD_LINKS
 687         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 688                 flags |= XMIT_HAS_IDEV_DATA;
 689         if (flags & XMIT_HAS_IDEV_DATA) {
 690                 int64 inode;
 691                 if (protocol_version < 26) {
 692                         dev = read_int(f);
 693                         inode = read_int(f);
 694                 } else {
 695                         if (!(flags & XMIT_SAME_DEV))
 696                                 dev = read_longint(f);
 697                         inode = read_longint(f);
 698                 }
 699                 if (flist->hlink_pool) {
 700                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 701                             struct idev, 1, "inode_table");
 702                         file->F_INODE = inode;
 703                         file->F_DEV = dev;
 704                 }
 705         }
 706 #endif
 707
 708         if (always_checksum && (sum_len || protocol_version < 28)) {
 709                 char *sum;
 710                 int slen = protocol_version < 21 ? 2 : MD4_SUM_LENGTH;
 711                 if (sum_len) {
 712                         file->u.sum = sum = bp;
 713                         /*bp += sum_len;*/
 714                 } else {
 715                         /* Prior to 28, we get a useless set of nulls. */
 716                         sum = empty_sum;
 717                 }
 718                 read_buf(f, sum, slen);
 719         }
 720
 721         if (!preserve_perms) {
 722                 /* set an appropriate set of permissions based on original
 723                  * permissions and umask. This emulates what GNU cp does */
 724                 file->mode &= ~orig_umask;
 725         }
 726
 727         return file;
 728 }
 729
 730
 731 /**
 732  * Create a file_struct for a named file by reading its stat()
 733  * information and performing extensive checks against global
 734  * options.
 735  *
 736  * @return the new file, or NULL if there was an error or this file
 737  * should be excluded.
 738  *
 739  * @todo There is a small optimization opportunity here to avoid
 740  * stat()ing the file in some circumstances, which has a certain cost.
 741  * We are called immediately after doing readdir(), and so we may
 742  * already know the d_type of the file.  We could for example avoid
 743  * statting directories if we're not recursing, but this is not a very
 744  * important case.  Some systems may not have d_type.
 745  **/
 746 struct file_struct *make_file(char *fname, struct file_list *flist,
 747                               int filter_level)
 748 {
 749         static char *lastdir;
 750         static int lastdir_len = -1;
 751         struct file_struct *file;
 752         STRUCT_STAT st;
 753         char sum[SUM_LENGTH];
 754         char thisname[MAXPATHLEN];
 755         char linkname[MAXPATHLEN];
 756         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 757         char *basename, *dirname, *bp;
 758         unsigned short flags = 0;
 759
 760         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 761                 lastdir_len = -1;
 762
 763         if (strlcpy(thisname, fname, sizeof thisname)
 764             >= sizeof thisname - flist_dir_len) {
 765                 rprintf(FINFO, "skipping overly long name: %s\n",
 766                         safe_fname(fname));
 767                 return NULL;
 768         }
 769         clean_fname(thisname, 0);
 770         if (sanitize_paths)
 771                 sanitize_path(thisname, thisname, "", 0);
 772
 773         memset(sum, 0, SUM_LENGTH);
 774
 775         if (readlink_stat(thisname, &st, linkname) != 0) {
 776                 int save_errno = errno;
 777                 /* See if file is excluded before reporting an error. */
 778                 if (filter_level != NO_FILTERS
 779                     && is_excluded(thisname, 0, filter_level))
 780                         return NULL;
 781                 if (save_errno == ENOENT) {
 782 #ifdef SUPPORT_LINKS
 783                         /* Avoid "vanished" error if symlink points nowhere. */
 784                         if (copy_links && do_lstat(thisname, &st) == 0
 785                             && S_ISLNK(st.st_mode)) {
 786                                 io_error |= IOERR_GENERAL;
 787                                 rprintf(FERROR, "symlink has no referent: %s\n",
 788                                         full_fname(thisname));
 789                         } else
 790 #endif
 791                         {
 792                                 enum logcode c = am_daemon && protocol_version < 28
 793                                     ? FERROR : FINFO;
 794                                 io_error |= IOERR_VANISHED;
 795                                 rprintf(c, "file has vanished: %s\n",
 796                                         full_fname(thisname));
 797                         }
 798                 } else {
 799                         io_error |= IOERR_GENERAL;
 800                         rsyserr(FERROR, save_errno, "readlink %s failed",
 801                                 full_fname(thisname));
 802                 }
 803                 return NULL;
 804         }
 805
 806         /* backup.c calls us with filter_level set to NO_FILTERS. */
 807         if (filter_level == NO_FILTERS)
 808                 goto skip_filters;
 809
 810         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
 811                 rprintf(FINFO, "skipping directory %s\n", safe_fname(thisname));
 812                 return NULL;
 813         }
 814
 815         /* We only care about directories because we need to avoid recursing
 816          * into a mount-point directory, not to avoid copying a symlinked
 817          * file if -L (or similar) was specified. */
 818         if (one_file_system && st.st_dev != filesystem_dev
 819             && S_ISDIR(st.st_mode))
 820                 flags |= FLAG_MOUNT_POINT;
 821
 822         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level))
 823                 return NULL;
 824
 825         if (lp_ignore_nonreadable(module_id)) {
 826 #ifdef SUPPORT_LINKS
 827                 if (!S_ISLNK(st.st_mode))
 828 #endif
 829                         if (access(thisname, R_OK) != 0)
 830                                 return NULL;
 831         }
 832
 833 skip_filters:
 834
 835         if (verbose > 2) {
 836                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 837                         who_am_i(), safe_fname(thisname), filter_level);
 838         }
 839
 840         if ((basename = strrchr(thisname, '/')) != NULL) {
 841                 dirname_len = ++basename - thisname; /* counts future '\0' */
 842                 if (lastdir_len == dirname_len - 1
 843                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 844                         dirname = lastdir;
 845                         dirname_len = 0; /* indicates no copy is needed */
 846                 } else
 847                         dirname = thisname;
 848         } else {
 849                 basename = thisname;
 850                 dirname = NULL;
 851                 dirname_len = 0;
 852         }
 853         basename_len = strlen(basename) + 1; /* count the '\0' */
 854
 855 #ifdef SUPPORT_LINKS
 856         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 857 #else
 858         linkname_len = 0;
 859 #endif
 860
 861         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 862
 863         alloc_len = file_struct_len + dirname_len + basename_len
 864             + linkname_len + sum_len;
 865         if (flist) {
 866                 bp = pool_alloc(flist->file_pool, alloc_len,
 867                     "receive_file_entry");
 868         } else {
 869                 if (!(bp = new_array(char, alloc_len)))
 870                         out_of_memory("receive_file_entry");
 871         }
 872
 873         file = (struct file_struct *)bp;
 874         memset(bp, 0, file_struct_len);
 875         bp += file_struct_len;
 876
 877         file->flags = flags;
 878         file->modtime = st.st_mtime;
 879         file->length = st.st_size;
 880         file->mode = st.st_mode;
 881         file->uid = st.st_uid;
 882         file->gid = st.st_gid;
 883
 884 #ifdef SUPPORT_HARD_LINKS
 885         if (flist && flist->hlink_pool) {
 886                 if (protocol_version < 28) {
 887                         if (S_ISREG(st.st_mode))
 888                                 file->link_u.idev = pool_talloc(
 889                                     flist->hlink_pool, struct idev, 1,
 890                                     "inode_table");
 891                 } else {
 892                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 893                                 file->link_u.idev = pool_talloc(
 894                                     flist->hlink_pool, struct idev, 1,
 895                                     "inode_table");
 896                 }
 897         }
 898         if (file->link_u.idev) {
 899                 file->F_DEV = st.st_dev;
 900                 file->F_INODE = st.st_ino;
 901         }
 902 #endif
 903
 904         if (dirname_len) {
 905                 file->dirname = lastdir = bp;
 906                 lastdir_len = dirname_len - 1;
 907                 memcpy(bp, dirname, dirname_len - 1);
 908                 bp += dirname_len;
 909                 bp[-1] = '\0';
 910         } else if (dirname)
 911                 file->dirname = dirname;
 912
 913         file->basename = bp;
 914         memcpy(bp, basename, basename_len);
 915         bp += basename_len;
 916
 917 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 918         if (preserve_devices && IS_DEVICE(st.st_mode))
 919                 file->u.rdev = st.st_rdev;
 920 #endif
 921
 922 #ifdef SUPPORT_LINKS
 923         if (linkname_len) {
 924                 file->u.link = bp;
 925                 memcpy(bp, linkname, linkname_len);
 926                 bp += linkname_len;
 927         }
 928 #endif
 929
 930         if (sum_len) {
 931                 file->u.sum = bp;
 932                 file_checksum(thisname, bp, st.st_size);
 933                 /*bp += sum_len;*/
 934         }
 935
 936         file->dir.root = flist_dir;
 937
 938         /* This code is only used by the receiver when it is building
 939          * a list of files for a delete pass. */
 940         if (keep_dirlinks && linkname_len && flist) {
 941                 STRUCT_STAT st2;
 942                 int save_mode = file->mode;
 943                 file->mode = S_IFDIR; /* find a directory w/our name */
 944                 if (flist_find(the_file_list, file) >= 0
 945                     && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
 946                         file->modtime = st2.st_mtime;
 947                         file->length = st2.st_size;
 948                         file->mode = st2.st_mode;
 949                         file->uid = st2.st_uid;
 950                         file->gid = st2.st_gid;
 951                         file->u.link = NULL;
 952                 } else
 953                         file->mode = save_mode;
 954         }
 955
 956         if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
 957                 stats.total_size += st.st_size;
 958
 959         return file;
 960 }
 961
 962
 963 static struct file_struct *send_file_name(int f, struct file_list *flist,
 964                                           char *fname, unsigned short base_flags)
 965 {
 966         struct file_struct *file;
 967
 968         file = make_file(fname, flist, f == -2 ? SERVER_FILTERS : ALL_FILTERS);
 969         if (!file)
 970                 return NULL;
 971
 972         maybe_emit_filelist_progress(flist->count + flist_count_offset);
 973
 974         flist_expand(flist);
 975
 976         if (file->basename[0]) {
 977                 flist->files[flist->count++] = file;
 978                 send_file_entry(file, f, base_flags);
 979         }
 980         return file;
 981 }
 982
 983 static void send_if_directory(int f, struct file_list *flist,
 984                               struct file_struct *file)
 985 {
 986         char fbuf[MAXPATHLEN];
 987
 988         if (S_ISDIR(file->mode)
 989             && !(file->flags & FLAG_MOUNT_POINT) && f_name_to(file, fbuf)) {
 990                 void *save_filters;
 991                 unsigned int len = strlen(fbuf);
 992                 if (len > 1 && fbuf[len-1] == '/')
 993                         fbuf[--len] = '\0';
 994                 if (len >= MAXPATHLEN - 1) {
 995                         io_error |= IOERR_GENERAL;
 996                         rprintf(FERROR, "skipping long-named directory: %s\n",
 997                                 full_fname(fbuf));
 998                         return;
 999                 }
1000                 save_filters = push_local_filters(fbuf, len);
1001                 send_directory(f, flist, fbuf, len);
1002                 pop_local_filters(save_filters);
1003         }
1004 }
1005
1006
1007 /* This function is normally called by the sender, but the receiving side also
1008  * calls it from get_dirlist() with f set to -1 so that we just construct the
1009  * file list in memory without sending it over the wire.  Also, get_dirlist()
1010  * might call this with f set to -2, which also indicates that local filter
1011  * rules should be ignored. */
1012 static void send_directory(int f, struct file_list *flist,
1013                            char *fbuf, int len)
1014 {
1015         struct dirent *di;
1016         unsigned remainder;
1017         char *p;
1018         DIR *d;
1019         int start = flist->count;
1020
1021         if (!(d = opendir(fbuf))) {
1022                 io_error |= IOERR_GENERAL;
1023                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1024                 return;
1025         }
1026
1027         p = fbuf + len;
1028         if (len != 1 || *fbuf != '/')
1029                 *p++ = '/';
1030         *p = '\0';
1031         remainder = MAXPATHLEN - (p - fbuf);
1032
1033         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1034                 char *dname = d_name(di);
1035                 if (dname[0] == '.' && (dname[1] == '\0'
1036                     || (dname[1] == '.' && dname[2] == '\0')))
1037                         continue;
1038                 if (strlcpy(p, dname, remainder) < remainder)
1039                         send_file_name(f, flist, fbuf, 0);
1040                 else {
1041                         io_error |= IOERR_GENERAL;
1042                         rprintf(FINFO,
1043                                 "cannot send long-named file %s\n",
1044                                 full_fname(fbuf));
1045                 }
1046         }
1047
1048         fbuf[len] = '\0';
1049
1050         if (errno) {
1051                 io_error |= IOERR_GENERAL;
1052                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1053         }
1054
1055         closedir(d);
1056
1057         if (recurse) {
1058                 int i, end = flist->count - 1;
1059                 for (i = start; i <= end; i++)
1060                         send_if_directory(f, flist, flist->files[i]);
1061         }
1062 }
1063
1064
1065 struct file_list *send_file_list(int f, int argc, char *argv[])
1066 {
1067         int l;
1068         STRUCT_STAT st;
1069         char *p, *dir, olddir[sizeof curr_dir];
1070         char lastpath[MAXPATHLEN] = "";
1071         struct file_list *flist;
1072         struct timeval start_tv, end_tv;
1073         int64 start_write;
1074         int use_ff_fd = 0;
1075
1076         if (show_filelist_p())
1077                 start_filelist_progress("building file list");
1078
1079         start_write = stats.total_written;
1080         gettimeofday(&start_tv, NULL);
1081
1082         flist = flist_new(WITH_HLINK, "send_file_list");
1083
1084         io_start_buffering_out();
1085         if (filesfrom_fd >= 0) {
1086                 if (argv[0] && !push_dir(argv[0])) {
1087                         rsyserr(FERROR, errno, "push_dir %s failed",
1088                                 full_fname(argv[0]));
1089                         exit_cleanup(RERR_FILESELECT);
1090                 }
1091                 use_ff_fd = 1;
1092         }
1093
1094         while (1) {
1095                 struct file_struct *file;
1096                 char fname2[MAXPATHLEN];
1097                 char *fname = fname2;
1098                 int is_dot_dir;
1099
1100                 if (use_ff_fd) {
1101                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1102                                 break;
1103                         sanitize_path(fname, fname, "", 0);
1104                 } else {
1105                         if (argc-- == 0)
1106                                 break;
1107                         strlcpy(fname, *argv++, MAXPATHLEN);
1108                         if (sanitize_paths)
1109                                 sanitize_path(fname, fname, "", 0);
1110                 }
1111
1112                 l = strlen(fname);
1113                 if (!l || fname[l - 1] == '/') {
1114                         if (l == 2 && fname[0] == '.') {
1115                                 /* Turn "./" into just "." rather than "./." */
1116                                 fname[1] = '\0';
1117                         } else {
1118                                 if (l + 1 >= MAXPATHLEN)
1119                                         overflow_exit("send_file_list");
1120                                 fname[l++] = '.';
1121                                 fname[l] = '\0';
1122                         }
1123                         is_dot_dir = 1;
1124                 } else if (l > 1 && fname[l-1] == '.' && fname[l-2] == '.'
1125                     && (l == 2 || fname[l-3] == '/')) {
1126                         if (l + 2 >= MAXPATHLEN)
1127                                 overflow_exit("send_file_list");
1128                         fname[l++] = '/';
1129                         fname[l++] = '.';
1130                         fname[l] = '\0';
1131                         is_dot_dir = 1;
1132                 } else {
1133                         is_dot_dir = fname[l-1] == '.'
1134                                    && (l == 1 || fname[l-2] == '/');
1135                 }
1136
1137                 if (link_stat(fname, &st, keep_dirlinks) != 0) {
1138                         io_error |= IOERR_GENERAL;
1139                         rsyserr(FERROR, errno, "link_stat %s failed",
1140                                 full_fname(fname));
1141                         continue;
1142                 }
1143
1144                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1145                         rprintf(FINFO, "skipping directory %s\n",
1146                                 safe_fname(fname));
1147                         continue;
1148                 }
1149
1150                 dir = NULL;
1151                 olddir[0] = '\0';
1152
1153                 if (!relative_paths) {
1154                         p = strrchr(fname, '/');
1155                         if (p) {
1156                                 *p = '\0';
1157                                 if (p == fname)
1158                                         dir = "/";
1159                                 else
1160                                         dir = fname;
1161                                 fname = p + 1;
1162                         }
1163                 } else if ((p = strstr(fname, "/./")) != NULL) {
1164                         *p = '\0';
1165                         if (p == fname)
1166                                 dir = "/";
1167                         else
1168                                 dir = fname;
1169                         fname = p + 3;
1170                 }
1171
1172                 if (!*fname)
1173                         fname = ".";
1174
1175                 if (dir && *dir) {
1176                         static char *lastdir;
1177                         static int lastdir_len;
1178
1179                         strcpy(olddir, curr_dir); /* can't overflow */
1180
1181                         if (!push_dir(dir)) {
1182                                 io_error |= IOERR_GENERAL;
1183                                 rsyserr(FERROR, errno, "push_dir %s failed",
1184                                         full_fname(dir));
1185                                 continue;
1186                         }
1187
1188                         if (lastdir && strcmp(lastdir, dir) == 0) {
1189                                 flist_dir = lastdir;
1190                                 flist_dir_len = lastdir_len;
1191                         } else {
1192                                 flist_dir = lastdir = strdup(dir);
1193                                 flist_dir_len = lastdir_len = strlen(dir);
1194                         }
1195                 }
1196
1197                 if (implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1198                         /* Send the implied directories at the start of the
1199                          * source spec, so we get their permissions right. */
1200                         char *lp = lastpath, *fn = fname, *slash = fname;
1201                         *p = '\0';
1202                         /* Skip any initial directories in our path that we
1203                          * have in common with lastpath. */
1204                         while (*fn && *lp == *fn) {
1205                                 if (*fn == '/')
1206                                         slash = fn;
1207                                 lp++, fn++;
1208                         }
1209                         *p = '/';
1210                         if (fn != p || (*lp && *lp != '/')) {
1211                                 int save_copy_links = copy_links;
1212                                 int save_xfer_dirs = xfer_dirs;
1213                                 copy_links = copy_unsafe_links;
1214                                 xfer_dirs = 1;
1215                                 while ((slash = strchr(slash+1, '/')) != 0) {
1216                                         *slash = '\0';
1217                                         send_file_name(f, flist, fname, 0);
1218                                         *slash = '/';
1219                                 }
1220                                 copy_links = save_copy_links;
1221                                 xfer_dirs = save_xfer_dirs;
1222                                 *p = '\0';
1223                                 strlcpy(lastpath, fname, sizeof lastpath);
1224                                 *p = '/';
1225                         }
1226                 }
1227
1228                 if (one_file_system)
1229                         filesystem_dev = st.st_dev;
1230
1231                 if ((file = send_file_name(f, flist, fname, XMIT_TOP_DIR))) {
1232                         if (recurse || (xfer_dirs && is_dot_dir))
1233                                 send_if_directory(f, flist, file);
1234                 }
1235
1236                 if (olddir[0]) {
1237                         flist_dir = NULL;
1238                         flist_dir_len = 0;
1239                         if (!pop_dir(olddir)) {
1240                                 rsyserr(FERROR, errno, "pop_dir %s failed",
1241                                         full_fname(olddir));
1242                                 exit_cleanup(RERR_FILESELECT);
1243                         }
1244                 }
1245         }
1246
1247         gettimeofday(&end_tv, NULL);
1248         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1249                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1250         if (stats.flist_buildtime == 0)
1251                 stats.flist_buildtime = 1;
1252         start_tv = end_tv;
1253
1254         send_file_entry(NULL, f, 0);
1255
1256         if (show_filelist_p())
1257                 finish_filelist_progress(flist);
1258
1259         gettimeofday(&end_tv, NULL);
1260         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1261                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1262
1263         if (flist->hlink_pool) {
1264                 pool_destroy(flist->hlink_pool);
1265                 flist->hlink_pool = NULL;
1266         }
1267
1268         /* Sort the list without removing any duplicates.  This allows the
1269          * receiving side to ask for any name they like, which gives us the
1270          * flexibility to change the way we unduplicate names in the future
1271          * without causing a compatibility problem with older versions. */
1272         clean_flist(flist, 0, 0);
1273
1274         /* Now send the uid/gid list. This was introduced in
1275          * protocol version 15 */
1276         send_uid_list(f);
1277
1278         /* send the io_error flag */
1279         write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1280
1281         io_end_buffering();
1282         stats.flist_size = stats.total_written - start_write;
1283         stats.num_files = flist->count;
1284
1285         if (verbose > 3)
1286                 output_flist(flist);
1287
1288         if (verbose > 2)
1289                 rprintf(FINFO, "send_file_list done\n");
1290
1291         return flist;
1292 }
1293
1294
1295 struct file_list *recv_file_list(int f)
1296 {
1297         struct file_list *flist;
1298         unsigned short flags;
1299         int64 start_read;
1300
1301         if (show_filelist_p())
1302                 start_filelist_progress("receiving file list");
1303
1304         start_read = stats.total_read;
1305
1306         flist = flist_new(WITH_HLINK, "recv_file_list");
1307
1308         flist->count = 0;
1309         flist->malloced = 1000;
1310         flist->files = new_array(struct file_struct *, flist->malloced);
1311         if (!flist->files)
1312                 goto oom;
1313
1314
1315         while ((flags = read_byte(f)) != 0) {
1316                 struct file_struct *file;
1317
1318                 flist_expand(flist);
1319
1320                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1321                         flags |= read_byte(f) << 8;
1322                 file = receive_file_entry(flist, flags, f);
1323
1324                 if (S_ISREG(file->mode))
1325                         stats.total_size += file->length;
1326
1327                 flist->files[flist->count++] = file;
1328
1329                 maybe_emit_filelist_progress(flist->count);
1330
1331                 if (verbose > 2) {
1332                         rprintf(FINFO, "recv_file_name(%s)\n",
1333                                 safe_fname(f_name(file)));
1334                 }
1335         }
1336         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1337
1338         if (verbose > 2)
1339                 rprintf(FINFO, "received %d names\n", flist->count);
1340
1341         if (show_filelist_p())
1342                 finish_filelist_progress(flist);
1343
1344         clean_flist(flist, relative_paths, 1);
1345
1346         if (f >= 0) {
1347                 /* Now send the uid/gid list. This was introduced in
1348                  * protocol version 15 */
1349                 recv_uid_list(f, flist);
1350
1351                 /* Recv the io_error flag */
1352                 if (lp_ignore_errors(module_id) || ignore_errors)
1353                         read_int(f);
1354                 else
1355                         io_error |= read_int(f);
1356         }
1357
1358         if (verbose > 3)
1359                 output_flist(flist);
1360
1361         if (list_only) {
1362                 int i;
1363                 for (i = 0; i < flist->count; i++)
1364                         list_file_entry(flist->files[i]);
1365         }
1366
1367         if (verbose > 2)
1368                 rprintf(FINFO, "recv_file_list done\n");
1369
1370         stats.flist_size = stats.total_read - start_read;
1371         stats.num_files = flist->count;
1372
1373         return flist;
1374
1375 oom:
1376         out_of_memory("recv_file_list");
1377         return NULL;            /* not reached */
1378 }
1379
1380
1381 static int file_compare(struct file_struct **file1, struct file_struct **file2)
1382 {
1383         return f_name_cmp(*file1, *file2);
1384 }
1385
1386
1387 /* Search for an identically-named item in the file list.  Note that the
1388  * items must agree in their directory-ness, or no match is returned. */
1389 int flist_find(struct file_list *flist, struct file_struct *f)
1390 {
1391         int low = flist->low, high = flist->high;
1392         int ret, mid, mid_up;
1393
1394         while (low <= high) {
1395                 mid = (low + high) / 2;
1396                 for (mid_up = mid; !flist->files[mid_up]->basename; mid_up++) {}
1397                 if (mid_up <= high)
1398                         ret = f_name_cmp(flist->files[mid_up], f);
1399                 else
1400                         ret = 1;
1401                 if (ret == 0) {
1402                         if (protocol_version < 29
1403                             && S_ISDIR(flist->files[mid_up]->mode)
1404                             != S_ISDIR(f->mode))
1405                                 return -1;
1406                         return mid_up;
1407                 }
1408                 if (ret > 0)
1409                         high = mid - 1;
1410                 else
1411                         low = mid_up + 1;
1412         }
1413         return -1;
1414 }
1415
1416
1417 /*
1418  * Free up any resources a file_struct has allocated
1419  * and clear the file.
1420  */
1421 void clear_file(int i, struct file_list *flist)
1422 {
1423         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1424                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1425         memset(flist->files[i], 0, file_struct_len);
1426 }
1427
1428
1429 /*
1430  * allocate a new file list
1431  */
1432 struct file_list *flist_new(int with_hlink, char *msg)
1433 {
1434         struct file_list *flist;
1435
1436         flist = new(struct file_list);
1437         if (!flist)
1438                 out_of_memory(msg);
1439
1440         memset(flist, 0, sizeof (struct file_list));
1441
1442         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1443             out_of_memory, POOL_INTERN)))
1444                 out_of_memory(msg);
1445
1446 #ifdef SUPPORT_HARD_LINKS
1447         if (with_hlink && preserve_hard_links) {
1448                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1449                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1450                         out_of_memory(msg);
1451         }
1452 #endif
1453
1454         return flist;
1455 }
1456
1457 /*
1458  * free up all elements in a flist
1459  */
1460 void flist_free(struct file_list *flist)
1461 {
1462         pool_destroy(flist->file_pool);
1463         pool_destroy(flist->hlink_pool);
1464         free(flist->files);
1465         free(flist);
1466 }
1467
1468
1469 /*
1470  * This routine ensures we don't have any duplicate names in our file list.
1471  * duplicate names can cause corruption because of the pipelining
1472  */
1473 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1474 {
1475         int i, prev_i = 0;
1476
1477         if (!flist)
1478                 return;
1479         if (flist->count == 0) {
1480                 flist->high = -1;
1481                 return;
1482         }
1483
1484         sorting_flist = flist;
1485         qsort(flist->files, flist->count,
1486             sizeof flist->files[0], (int (*)())file_compare);
1487         sorting_flist = NULL;
1488
1489         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1490                 if (flist->files[i]->basename) {
1491                         prev_i = i;
1492                         break;
1493                 }
1494         }
1495         flist->low = prev_i;
1496         while (++i < flist->count) {
1497                 int j;
1498                 struct file_struct *file = flist->files[i];
1499
1500                 if (!file->basename)
1501                         continue;
1502                 if (f_name_cmp(file, flist->files[prev_i]) == 0)
1503                         j = prev_i;
1504                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
1505                         int save_mode = file->mode;
1506                         /* Make sure that this directory doesn't duplicate a
1507                          * non-directory earlier in the list. */
1508                         flist->high = prev_i;
1509                         file->mode = S_IFREG;
1510                         j = flist_find(flist, file);
1511                         file->mode = save_mode;
1512                 } else
1513                         j = -1;
1514                 if (j >= 0) {
1515                         struct file_struct *fp = flist->files[j];
1516                         int keep, drop;
1517                         /* If one is a dir and the other is not, we want to
1518                          * keep the dir because it might have contents in the
1519                          * list. */
1520                         if (S_ISDIR(file->mode) != S_ISDIR(fp->mode)) {
1521                                 if (S_ISDIR(file->mode))
1522                                         keep = i, drop = j;
1523                                 else
1524                                         keep = j, drop = i;
1525                         } else
1526                                 keep = j, drop = i;
1527                         if (verbose > 1 && !am_server) {
1528                                 rprintf(FINFO,
1529                                         "removing duplicate name %s from file list (%d)\n",
1530                                         safe_fname(f_name(file)), drop);
1531                         }
1532                         /* Make sure that if we unduplicate '.', that we don't
1533                          * lose track of a user-specified top directory. */
1534                         flist->files[keep]->flags |= flist->files[drop]->flags
1535                                                    & (FLAG_TOP_DIR|FLAG_DEL_HERE);
1536
1537                         clear_file(drop, flist);
1538
1539                         if (keep == i) {
1540                                 if (flist->low == drop) {
1541                                         for (j = drop + 1;
1542                                              j < i && !flist->files[j]->basename;
1543                                              j++) {}
1544                                         flist->low = j;
1545                                 }
1546                                 prev_i = i;
1547                         }
1548                 } else
1549                         prev_i = i;
1550         }
1551         flist->high = no_dups ? prev_i : flist->count - 1;
1552
1553         if (strip_root) {
1554                 /* We need to strip off the leading slashes for relative
1555                  * paths, but this must be done _after_ the sorting phase. */
1556                 for (i = flist->low; i <= flist->high; i++) {
1557                         struct file_struct *file = flist->files[i];
1558
1559                         if (!file->dirname)
1560                                 continue;
1561                         if (*file->dirname == '/') {
1562                                 char *s = file->dirname + 1;
1563                                 while (*s == '/') s++;
1564                                 memmove(file->dirname, s, strlen(s) + 1);
1565                         }
1566
1567                         if (!*file->dirname)
1568                                 file->dirname = NULL;
1569                 }
1570         }
1571 }
1572
1573
1574 static void output_flist(struct file_list *flist)
1575 {
1576         char uidbuf[16], gidbuf[16], depthbuf[16];
1577         struct file_struct *file;
1578         const char *who = who_am_i();
1579         int i;
1580
1581         for (i = 0; i < flist->count; i++) {
1582                 file = flist->files[i];
1583                 if ((am_root || am_sender) && preserve_uid)
1584                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1585                 else
1586                         *uidbuf = '\0';
1587                 if (preserve_gid && file->gid != GID_NONE)
1588                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1589                 else
1590                         *gidbuf = '\0';
1591                 if (!am_sender)
1592                         sprintf(depthbuf, "%d", file->dir.depth);
1593                 rprintf(FINFO, "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
1594                         who, i, am_sender ? NS(file->dir.root) : depthbuf,
1595                         file->dirname ? safe_fname(file->dirname) : "",
1596                         file->dirname ? "/" : "", NS(file->basename),
1597                         S_ISDIR(file->mode) ? "/" : "", (int)file->mode,
1598                         (double)file->length, uidbuf, gidbuf, file->flags);
1599         }
1600 }
1601
1602
1603 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
1604 enum fnc_type { t_PATH, t_ITEM };
1605
1606 /* Compare the names of two file_struct entities, similar to how strcmp()
1607  * would do if it were operating on the joined strings.
1608  *
1609  * Some differences beginning with protocol_version 29: (1) directory names
1610  * are compared with an assumed trailing slash so that they compare in a
1611  * way that would cause them to sort immediately prior to any content they
1612  * may have; (2) a directory of any name compares after a non-directory of
1613  * any name at the same depth; (3) a directory with name "." compares prior
1614  * to anything else.  These changes mean that a directory and a non-dir
1615  * with the same name will not compare as equal (protocol_version >= 29).
1616  *
1617  * The dirname component can be an empty string, but the basename component
1618  * cannot (and never is in the current codebase).  The basename component
1619  * may be NULL (for a removed item), in which case it is considered to be
1620  * after any existing item. */
1621 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1622 {
1623         int dif;
1624         const uchar *c1, *c2;
1625         enum fnc_state state1, state2;
1626         enum fnc_type type1, type2;
1627         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
1628
1629         if (!f1 || !f1->basename) {
1630                 if (!f2 || !f2->basename)
1631                         return 0;
1632                 return -1;
1633         }
1634         if (!f2 || !f2->basename)
1635                 return 1;
1636
1637         c1 = (uchar*)f1->dirname;
1638         c2 = (uchar*)f2->dirname;
1639         if (c1 == c2)
1640                 c1 = c2 = NULL;
1641         if (!c1) {
1642                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1643                 c1 = (uchar*)f1->basename;
1644                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1645                         type1 = t_ITEM;
1646                         state1 = s_TRAILING;
1647                         c1 = (uchar*)"";
1648                 } else
1649                         state1 = s_BASE;
1650         } else if (!*c1) {
1651                 type1 = t_path;
1652                 state1 = s_SLASH;
1653                 c1 = (uchar*)"/";
1654         } else {
1655                 type1 = t_path;
1656                 state1 = s_DIR;
1657         }
1658         if (!c2) {
1659                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1660                 c2 = (uchar*)f2->basename;
1661                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1662                         type2 = t_ITEM;
1663                         state2 = s_TRAILING;
1664                         c2 = (uchar*)"";
1665                 } else
1666                         state2 = s_BASE;
1667         } else if (!*c2) {
1668                 type2 = t_path;
1669                 state2 = s_SLASH;
1670                 c2 = (uchar*)"/";
1671         } else {
1672                 type2 = t_path;
1673                 state2 = s_DIR;
1674         }
1675
1676         if (type1 != type2)
1677                 return type1 == t_PATH ? 1 : -1;
1678
1679         while (1) {
1680                 if ((dif = (int)*c1++ - (int)*c2++) != 0)
1681                         break;
1682                 if (!*c1) {
1683                         switch (state1) {
1684                         case s_DIR:
1685                                 state1 = s_SLASH;
1686                                 c1 = (uchar*)"/";
1687                                 break;
1688                         case s_SLASH:
1689                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1690                                 c1 = (uchar*)f1->basename;
1691                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1692                                         type1 = t_ITEM;
1693                                         state1 = s_TRAILING;
1694                                         c1 = (uchar*)"";
1695                                 } else
1696                                         state1 = s_BASE;
1697                                 break;
1698                         case s_BASE:
1699                                 state1 = s_TRAILING;
1700                                 if (type1 == t_PATH) {
1701                                         c1 = (uchar*)"/";
1702                                         break;
1703                                 }
1704                                 /* FALL THROUGH */
1705                         case s_TRAILING:
1706                                 type1 = t_ITEM;
1707                                 break;
1708                         }
1709                         if (*c2 && type1 != type2)
1710                                 return type1 == t_PATH ? 1 : -1;
1711                 }
1712                 if (!*c2) {
1713                         switch (state2) {
1714                         case s_DIR:
1715                                 state2 = s_SLASH;
1716                                 c2 = (uchar*)"/";
1717                                 break;
1718                         case s_SLASH:
1719                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1720                                 c2 = (uchar*)f2->basename;
1721                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1722                                         type2 = t_ITEM;
1723                                         state2 = s_TRAILING;
1724                                         c2 = (uchar*)"";
1725                                 } else
1726                                         state2 = s_BASE;
1727                                 break;
1728                         case s_BASE:
1729                                 state2 = s_TRAILING;
1730                                 if (type2 == t_PATH) {
1731                                         c2 = (uchar*)"/";
1732                                         break;
1733                                 }
1734                                 /* FALL THROUGH */
1735                         case s_TRAILING:
1736                                 if (!*c1)
1737                                         return 0;
1738                                 type2 = t_ITEM;
1739                                 break;
1740                         }
1741                         if (type1 != type2)
1742                                 return type1 == t_PATH ? 1 : -1;
1743                 }
1744         }
1745
1746         return dif;
1747 }
1748
1749
1750 /* Return a copy of the full filename of a flist entry, using the indicated
1751  * buffer.  No size-checking is done because we checked the size when creating
1752  * the file_struct entry.
1753  */
1754 char *f_name_to(struct file_struct *f, char *fbuf)
1755 {
1756         if (!f || !f->basename)
1757                 return NULL;
1758
1759         if (f->dirname) {
1760                 int len = strlen(f->dirname);
1761                 memcpy(fbuf, f->dirname, len);
1762                 fbuf[len] = '/';
1763                 strcpy(fbuf + len + 1, f->basename);
1764         } else
1765                 strcpy(fbuf, f->basename);
1766         return fbuf;
1767 }
1768
1769
1770 /* Like f_name_to(), but we rotate through 5 static buffers of our own. */
1771 char *f_name(struct file_struct *f)
1772 {
1773         static char names[5][MAXPATHLEN];
1774         static unsigned int n;
1775
1776         n = (n + 1) % (sizeof names / sizeof names[0]);
1777
1778         return f_name_to(f, names[n]);
1779 }
1780
1781
1782 /* Do a non-recursive scan of the named directory, possibly ignoring all
1783  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
1784  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
1785  * buffer (the functions we call will append names onto the end, but the old
1786  * dir value will be restored on exit). */
1787 struct file_list *get_dirlist(char *dirname, int dlen,
1788                               int ignore_filter_rules)
1789 {
1790         struct file_list *dirlist;
1791         char dirbuf[MAXPATHLEN];
1792         int save_recurse = recurse;
1793
1794         if (dlen < 0) {
1795                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
1796                 if (dlen >= MAXPATHLEN)
1797                         return NULL;
1798                 dirname = dirbuf;
1799         }
1800
1801         dirlist = flist_new(WITHOUT_HLINK, "get_dirlist");
1802
1803         recurse = 0;
1804         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen);
1805         recurse = save_recurse;
1806         if (do_progress)
1807                 flist_count_offset += dirlist->count;
1808
1809         clean_flist(dirlist, 0, 0);
1810
1811         if (verbose > 3)
1812                 output_flist(dirlist);
1813
1814         return dirlist;
1815 }