flist.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4    Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 /** @file flist.c
  22  * Generate and receive file lists
  23  *
  24  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
  25  *
  26  **/
  27
  28 #include "rsync.h"
  29
  30 extern struct stats stats;
  31
  32 extern int verbose;
  33 extern int do_progress;
  34 extern int am_root;
  35 extern int am_server;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40
  41 extern int cvs_exclude;
  42
  43 extern int recurse;
  44 extern char curr_dir[MAXPATHLEN];
  45 extern char *files_from;
  46 extern int filesfrom_fd;
  47
  48 extern int one_file_system;
  49 extern int make_backups;
  50 extern int preserve_links;
  51 extern int preserve_hard_links;
  52 extern int preserve_perms;
  53 extern int preserve_devices;
  54 extern int preserve_uid;
  55 extern int preserve_gid;
  56 extern int preserve_times;
  57 extern int relative_paths;
  58 extern int implied_dirs;
  59 extern int copy_links;
  60 extern int copy_unsafe_links;
  61 extern int protocol_version;
  62 extern int sanitize_paths;
  63
  64 extern int read_batch;
  65 extern int write_batch;
  66
  67 extern struct exclude_struct **exclude_list;
  68 extern struct exclude_struct **server_exclude_list;
  69 extern struct exclude_struct **local_exclude_list;
  70
  71 int io_error;
  72
  73 static char empty_sum[MD4_SUM_LENGTH];
  74 static unsigned int min_file_struct_len;
  75
  76 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  77 static void output_flist(struct file_list *flist);
  78
  79
  80 void init_flist(void)
  81 {
  82         struct file_struct f;
  83
  84         /* Figure out how big the file_struct is without trailing padding */
  85         min_file_struct_len = ((char*)&f.flags - (char*)&f) + sizeof f.flags;
  86 }
  87
  88
  89 static int show_filelist_p(void)
  90 {
  91         return verbose && (recurse || files_from) && !am_server;
  92 }
  93
  94 static void start_filelist_progress(char *kind)
  95 {
  96         rprintf(FINFO, "%s ... ", kind);
  97         if ((verbose > 1) || do_progress)
  98                 rprintf(FINFO, "\n");
  99         rflush(FINFO);
 100 }
 101
 102
 103 static void emit_filelist_progress(const struct file_list *flist)
 104 {
 105         rprintf(FINFO, " %d files...\r", flist->count);
 106 }
 107
 108
 109 static void maybe_emit_filelist_progress(const struct file_list *flist)
 110 {
 111         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 112                 emit_filelist_progress(flist);
 113 }
 114
 115
 116 static void finish_filelist_progress(const struct file_list *flist)
 117 {
 118         if (do_progress) {
 119                 /* This overwrites the progress line */
 120                 rprintf(FINFO, "%d file%sto consider\n",
 121                         flist->count, flist->count == 1 ? " " : "s ");
 122         } else
 123                 rprintf(FINFO, "done\n");
 124 }
 125
 126 void show_flist_stats(void)
 127 {
 128         /* Nothing yet */
 129 }
 130
 131
 132 static void list_file_entry(struct file_struct *f)
 133 {
 134         char perms[11];
 135
 136         if (!f->basename)
 137                 /* this can happen if duplicate names were removed */
 138                 return;
 139
 140         permstring(perms, f->mode);
 141
 142 #if 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                         f_name(f), f->u.link);
 148         } else
 149 #endif
 150                 rprintf(FINFO, "%s %11.0f %s %s\n",
 151                         perms,
 152                         (double) f->length, timestring(f->modtime),
 153                         f_name(f));
 154 }
 155
 156
 157 /**
 158  * Stat either a symlink or its referent, depending on the settings of
 159  * copy_links, copy_unsafe_links, etc.
 160  *
 161  * @retval -1 on error
 162  *
 163  * @retval 0 for success
 164  *
 165  * @post If @p path is a symlink, then @p linkbuf (of size @c
 166  * MAXPATHLEN) contains the symlink target.
 167  *
 168  * @post @p buffer contains information about the link or the
 169  * referrent as appropriate, if they exist.
 170  **/
 171 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 172 {
 173 #if SUPPORT_LINKS
 174         if (copy_links)
 175                 return do_stat(path, buffer);
 176         if (do_lstat(path, buffer) == -1)
 177                 return -1;
 178         if (S_ISLNK(buffer->st_mode)) {
 179                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 180                 if (l == -1)
 181                         return -1;
 182                 linkbuf[l] = 0;
 183                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 184                         if (verbose > 1) {
 185                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 186                                         path, linkbuf);
 187                         }
 188                         return do_stat(path, buffer);
 189                 }
 190         }
 191         return 0;
 192 #else
 193         return do_stat(path, buffer);
 194 #endif
 195 }
 196
 197 int link_stat(const char *path, STRUCT_STAT * buffer)
 198 {
 199 #if SUPPORT_LINKS
 200         if (copy_links)
 201                 return do_stat(path, buffer);
 202         return do_lstat(path, buffer);
 203 #else
 204         return do_stat(path, buffer);
 205 #endif
 206 }
 207
 208 /*
 209  * This function is used to check if a file should be included/excluded
 210  * from the list of files based on its name and type etc.  The value of
 211  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 212  */
 213 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 214 {
 215 #if 0 /* This currently never happens, so avoid a useless compare. */
 216         if (exclude_level == NO_EXCLUDES)
 217                 return 0;
 218 #endif
 219         if (fname) {
 220                 /* never exclude '.', even if somebody does --exclude '*' */
 221                 if (fname[0] == '.' && !fname[1])
 222                         return 0;
 223                 /* Handle the -R version of the '.' dir. */
 224                 if (fname[0] == '/') {
 225                         int len = strlen(fname);
 226                         if (fname[len-1] == '.' && fname[len-2] == '/')
 227                                 return 0;
 228                 }
 229         }
 230         if (server_exclude_list
 231          && check_exclude(server_exclude_list, fname, is_dir))
 232                 return 1;
 233         if (exclude_level != ALL_EXCLUDES)
 234                 return 0;
 235         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 236                 return 1;
 237         if (local_exclude_list
 238          && check_exclude(local_exclude_list, fname, is_dir))
 239                 return 1;
 240         return 0;
 241 }
 242
 243 /* used by the one_file_system code */
 244 static dev_t filesystem_dev;
 245
 246 static void set_filesystem(char *fname)
 247 {
 248         STRUCT_STAT st;
 249         if (link_stat(fname, &st) != 0)
 250                 return;
 251         filesystem_dev = st.st_dev;
 252 }
 253
 254
 255 static int to_wire_mode(mode_t mode)
 256 {
 257 #if SUPPORT_LINKS
 258         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 259                 return (mode & ~(_S_IFMT)) | 0120000;
 260 #endif
 261         return (int) mode;
 262 }
 263
 264 static mode_t from_wire_mode(int mode)
 265 {
 266         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 267                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 268         return (mode_t) mode;
 269 }
 270
 271
 272 static void send_directory(int f, struct file_list *flist, char *dir);
 273
 274 static char *flist_dir;
 275 static int flist_dir_len;
 276
 277
 278 /**
 279  * Make sure @p flist is big enough to hold at least @p flist->count
 280  * entries.
 281  **/
 282 static void flist_expand(struct file_list *flist)
 283 {
 284         if (flist->count >= flist->malloced) {
 285                 void *new_ptr;
 286
 287                 if (flist->malloced < 1000)
 288                         flist->malloced += 1000;
 289                 else
 290                         flist->malloced *= 2;
 291
 292                 if (flist->files) {
 293                         new_ptr = realloc_array(flist->files,
 294                                                 struct file_struct *,
 295                                                 flist->malloced);
 296                 } else {
 297                         new_ptr = new_array(struct file_struct *,
 298                                             flist->malloced);
 299                 }
 300
 301                 if (verbose >= 2) {
 302                         rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 303                             who_am_i(),
 304                             (double) sizeof flist->files[0] * flist->malloced,
 305                             (new_ptr == flist->files) ? " not" : "");
 306                 }
 307
 308                 flist->files = (struct file_struct **) new_ptr;
 309
 310                 if (!flist->files)
 311                         out_of_memory("flist_expand");
 312         }
 313 }
 314
 315 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 316 {
 317         unsigned short flags;
 318         static time_t modtime;
 319         static mode_t mode;
 320         static DEV64_T rdev, rdev_high;
 321         static DEV64_T dev;
 322         static uid_t uid;
 323         static gid_t gid;
 324         static char lastname[MAXPATHLEN];
 325         char *fname, fbuf[MAXPATHLEN];
 326         int l1, l2;
 327
 328         if (f == -1)
 329                 return;
 330
 331         if (!file) {
 332                 write_byte(f, 0);
 333                 modtime = 0, mode = 0;
 334                 rdev = 0, rdev_high = 0, dev = 0;
 335                 uid = 0, gid = 0;
 336                 *lastname = '\0';
 337                 return;
 338         }
 339
 340         io_write_phase = "send_file_entry";
 341
 342         fname = f_name_to(file, fbuf);
 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                                         /* Set both flags to simplify the test
 355                                          * when writing the data. */
 356                                         flags |= XMIT_SAME_RDEV_pre28
 357                                                | XMIT_SAME_HIGH_RDEV;
 358                                 } else
 359                                         rdev = file->u.rdev;
 360                         } else
 361                                 rdev = 0;
 362                 } else if (IS_DEVICE(mode)) {
 363                         if ((file->u.rdev & ~0xFF) == rdev_high)
 364                                 flags |= XMIT_SAME_HIGH_RDEV;
 365                         else {
 366                                 rdev = file->u.rdev;
 367                                 rdev_high = rdev & ~0xFF;
 368                         }
 369                 }
 370         }
 371         if (file->uid == uid)
 372                 flags |= XMIT_SAME_UID;
 373         else
 374                 uid = file->uid;
 375         if (file->gid == gid)
 376                 flags |= XMIT_SAME_GID;
 377         else
 378                 gid = file->gid;
 379         if (file->modtime == modtime)
 380                 flags |= XMIT_SAME_TIME;
 381         else
 382                 modtime = file->modtime;
 383
 384 #if SUPPORT_HARD_LINKS
 385         if (file->link_u.idev) {
 386                 if (file->F_DEV == dev) {
 387                         if (protocol_version >= 28)
 388                                 flags |= XMIT_SAME_DEV;
 389                 } else
 390                         dev = file->F_DEV;
 391                 flags |= XMIT_HAS_IDEV_DATA;
 392         }
 393 #endif
 394
 395         for (l1 = 0;
 396              lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 397              l1++) {}
 398         l2 = strlen(fname+l1);
 399
 400         if (l1 > 0)
 401                 flags |= XMIT_SAME_NAME;
 402         if (l2 > 255)
 403                 flags |= XMIT_LONG_NAME;
 404
 405         /* We must make sure we don't send a zero flag byte or the
 406          * other end will terminate the flist transfer.  Note that
 407          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 408          * it's harmless way to add a bit to the first flag byte. */
 409         if (protocol_version >= 28) {
 410                 if (!flags && !S_ISDIR(mode))
 411                         flags |= XMIT_TOP_DIR;
 412                 if ((flags & 0xFF00) || !flags) {
 413                         flags |= XMIT_EXTENDED_FLAGS;
 414                         write_byte(f, flags);
 415                         write_byte(f, flags >> 8);
 416                 } else
 417                         write_byte(f, flags);
 418         } else {
 419                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 420                         flags |= XMIT_TOP_DIR;
 421                 if (!(flags & 0xFF))
 422                         flags |= XMIT_LONG_NAME;
 423                 write_byte(f, flags);
 424         }
 425         if (flags & XMIT_SAME_NAME)
 426                 write_byte(f, l1);
 427         if (flags & XMIT_LONG_NAME)
 428                 write_int(f, l2);
 429         else
 430                 write_byte(f, l2);
 431         write_buf(f, fname + l1, l2);
 432
 433         write_longint(f, file->length);
 434         if (!(flags & XMIT_SAME_TIME))
 435                 write_int(f, modtime);
 436         if (!(flags & XMIT_SAME_MODE))
 437                 write_int(f, to_wire_mode(mode));
 438         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 439                 if (!numeric_ids)
 440                         add_uid(uid);
 441                 write_int(f, uid);
 442         }
 443         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 444                 if (!numeric_ids)
 445                         add_gid(gid);
 446                 write_int(f, gid);
 447         }
 448         if (preserve_devices && IS_DEVICE(mode)) {
 449                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 450                  * also off. */
 451                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 452                         write_int(f, rdev);
 453                 else if (protocol_version >= 28)
 454                         write_byte(f, rdev);
 455         }
 456
 457 #if SUPPORT_LINKS
 458         if (preserve_links && S_ISLNK(mode)) {
 459                 int len = strlen(file->u.link);
 460                 write_int(f, len);
 461                 write_buf(f, file->u.link, len);
 462         }
 463 #endif
 464
 465 #if SUPPORT_HARD_LINKS
 466         if (flags & XMIT_HAS_IDEV_DATA) {
 467                 if (protocol_version < 26) {
 468                         /* 32-bit dev_t and ino_t */
 469                         write_int(f, dev);
 470                         write_int(f, file->F_INODE);
 471                 } else {
 472                         /* 64-bit dev_t and ino_t */
 473                         if (!(flags & XMIT_SAME_DEV))
 474                                 write_longint(f, dev);
 475                         write_longint(f, file->F_INODE);
 476                 }
 477         }
 478 #endif
 479
 480         if (always_checksum) {
 481                 char *sum;
 482                 if (S_ISREG(mode))
 483                         sum = file->u.sum;
 484                 else if (protocol_version < 28) {
 485                         /* Prior to 28, we sent a useless set of nulls. */
 486                         sum = empty_sum;
 487                 } else
 488                         sum = NULL;
 489                 if (sum) {
 490                         write_buf(f, sum, protocol_version < 21? 2
 491                                                         : MD4_SUM_LENGTH);
 492                 }
 493         }
 494
 495         strlcpy(lastname, fname, MAXPATHLEN);
 496
 497         io_write_phase = "unknown";
 498 }
 499
 500
 501
 502 void receive_file_entry(struct file_struct **fptr, unsigned short flags, int f)
 503 {
 504         static time_t modtime;
 505         static mode_t mode;
 506         static DEV64_T rdev, rdev_high;
 507         static DEV64_T dev;
 508         static uid_t uid;
 509         static gid_t gid;
 510         static char lastname[MAXPATHLEN], *lastdir;
 511         static int lastdir_len = -1;
 512         char thisname[MAXPATHLEN];
 513         unsigned int l1 = 0, l2 = 0;
 514         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 515         int file_struct_len, idev_len;
 516         OFF_T file_length;
 517         char *basename, *dirname, *bp;
 518         struct file_struct *file;
 519
 520         if (!fptr) {
 521                 modtime = 0, mode = 0;
 522                 rdev = 0, rdev_high = 0, dev = 0;
 523                 uid = 0, gid = 0;
 524                 *lastname = '\0';
 525                 return;
 526         }
 527
 528         if (flags & XMIT_SAME_NAME)
 529                 l1 = read_byte(f);
 530
 531         if (flags & XMIT_LONG_NAME)
 532                 l2 = read_int(f);
 533         else
 534                 l2 = read_byte(f);
 535
 536         if (l2 >= MAXPATHLEN - l1) {
 537                 rprintf(FERROR,
 538                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 539                         flags, l1, l2, lastname);
 540                 overflow("receive_file_entry");
 541         }
 542
 543         strlcpy(thisname, lastname, l1 + 1);
 544         read_sbuf(f, &thisname[l1], l2);
 545         thisname[l1 + l2] = 0;
 546
 547         strlcpy(lastname, thisname, MAXPATHLEN);
 548
 549         clean_fname(thisname);
 550
 551         if (sanitize_paths)
 552                 sanitize_path(thisname, NULL);
 553
 554         if ((basename = strrchr(thisname, '/')) != NULL) {
 555                 dirname_len = ++basename - thisname; /* counts future '\0' */
 556                 if (lastdir_len == dirname_len - 1
 557                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 558                         dirname = lastdir;
 559                         dirname_len = 0; /* indicates no copy is needed */
 560                 } else
 561                         dirname = thisname;
 562         } else {
 563                 basename = thisname;
 564                 dirname = NULL;
 565                 dirname_len = 0;
 566         }
 567         basename_len = strlen(basename) + 1; /* count the '\0' */
 568
 569         file_length = read_longint(f);
 570         if (!(flags & XMIT_SAME_TIME))
 571                 modtime = (time_t)read_int(f);
 572         if (!(flags & XMIT_SAME_MODE))
 573                 mode = from_wire_mode(read_int(f));
 574
 575         if (preserve_uid && !(flags & XMIT_SAME_UID))
 576                 uid = (uid_t)read_int(f);
 577         if (preserve_gid && !(flags & XMIT_SAME_GID))
 578                 gid = (gid_t)read_int(f);
 579
 580         if (preserve_devices) {
 581                 if (protocol_version < 28) {
 582                         if (IS_DEVICE(mode)) {
 583                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 584                                         rdev = (DEV64_T)read_int(f);
 585                         } else
 586                                 rdev = 0;
 587                 } else if (IS_DEVICE(mode)) {
 588                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 589                                 rdev = (DEV64_T)read_int(f);
 590                                 rdev_high = rdev & ~0xFF;
 591                         } else
 592                                 rdev = rdev_high | (DEV64_T)read_byte(f);
 593                 }
 594         }
 595
 596 #if SUPPORT_LINKS
 597         if (preserve_links && S_ISLNK(mode)) {
 598                 linkname_len = read_int(f) + 1; /* count the '\0' */
 599                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 600                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 601                                 linkname_len - 1);
 602                         overflow("receive_file_entry");
 603                 }
 604         }
 605         else
 606 #endif
 607                 linkname_len = 0;
 608
 609 #if SUPPORT_HARD_LINKS
 610         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 611                 flags |= XMIT_HAS_IDEV_DATA;
 612         if (flags & XMIT_HAS_IDEV_DATA)
 613                 idev_len = sizeof (struct idev);
 614         else
 615 #endif
 616                 idev_len = 0;
 617
 618         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 619         file_struct_len = idev_len? sizeof file[0] : min_file_struct_len;
 620
 621         alloc_len = file_struct_len + dirname_len + basename_len
 622                   + linkname_len + sum_len + idev_len;
 623         if (!(bp = new_array(char, alloc_len)))
 624                 out_of_memory("receive_file_entry");
 625         file = *fptr = (struct file_struct *)bp;
 626         memset(bp, 0, min_file_struct_len);
 627         bp += file_struct_len;
 628
 629         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 630         file->modtime = modtime;
 631         file->length = file_length;
 632         file->mode = mode;
 633         file->uid = uid;
 634         file->gid = gid;
 635
 636 #if SUPPORT_HARD_LINKS
 637         if (idev_len) {
 638                 file->link_u.idev = (struct idev *)bp;
 639                 bp += idev_len;
 640         }
 641 #endif
 642
 643         if (dirname_len) {
 644                 file->dirname = lastdir = bp;
 645                 lastdir_len = dirname_len - 1;
 646                 memcpy(bp, dirname, dirname_len - 1);
 647                 bp += dirname_len;
 648                 bp[-1] = '\0';
 649         } else if (dirname)
 650                 file->dirname = dirname;
 651
 652         file->basename = bp;
 653         memcpy(bp, basename, basename_len);
 654         bp += basename_len;
 655
 656         if (preserve_devices && IS_DEVICE(mode))
 657                 file->u.rdev = rdev;
 658
 659 #if SUPPORT_LINKS
 660         if (linkname_len) {
 661                 file->u.link = bp;
 662                 read_sbuf(f, bp, linkname_len - 1);
 663                 if (sanitize_paths)
 664                         sanitize_path(bp, lastdir);
 665                 bp += linkname_len;
 666         }
 667 #endif
 668
 669 #if SUPPORT_HARD_LINKS
 670         if (idev_len) {
 671                 if (protocol_version < 26) {
 672                         dev = read_int(f);
 673                         file->F_INODE = read_int(f);
 674                 } else {
 675                         if (!(flags & XMIT_SAME_DEV))
 676                                 dev = read_longint(f);
 677                         file->F_INODE = read_longint(f);
 678                 }
 679                 file->F_DEV = dev;
 680         }
 681 #endif
 682
 683         if (always_checksum) {
 684                 char *sum;
 685                 if (sum_len) {
 686                         file->u.sum = sum = bp;
 687                         /*bp += sum_len;*/
 688                 } else if (protocol_version < 28) {
 689                         /* Prior to 28, we get a useless set of nulls. */
 690                         sum = empty_sum;
 691                 } else
 692                         sum = NULL;
 693                 if (sum) {
 694                         read_buf(f, sum, protocol_version < 21? 2
 695                                                 : MD4_SUM_LENGTH);
 696                 }
 697         }
 698
 699         if (!preserve_perms) {
 700                 extern int orig_umask;
 701                 /* set an appropriate set of permissions based on original
 702                  * permissions and umask. This emulates what GNU cp does */
 703                 file->mode &= ~orig_umask;
 704         }
 705 }
 706
 707
 708 /**
 709  * Create a file_struct for a named file by reading its stat()
 710  * information and performing extensive checks against global
 711  * options.
 712  *
 713  * @return the new file, or NULL if there was an error or this file
 714  * should be excluded.
 715  *
 716  * @todo There is a small optimization opportunity here to avoid
 717  * stat()ing the file in some circumstances, which has a certain cost.
 718  * We are called immediately after doing readdir(), and so we may
 719  * already know the d_type of the file.  We could for example avoid
 720  * statting directories if we're not recursing, but this is not a very
 721  * important case.  Some systems may not have d_type.
 722  **/
 723 struct file_struct *make_file(char *fname, int exclude_level)
 724 {
 725         static char *lastdir;
 726         static int lastdir_len = -1;
 727         struct file_struct *file;
 728         STRUCT_STAT st;
 729         char sum[SUM_LENGTH];
 730         char thisname[MAXPATHLEN];
 731         char linkname[MAXPATHLEN];
 732         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 733         int file_struct_len, idev_len;
 734         char *basename, *dirname, *bp;
 735         unsigned short flags = 0;
 736
 737         if (strlcpy(thisname, fname, sizeof thisname)
 738             >= sizeof thisname - flist_dir_len) {
 739                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 740                 return NULL;
 741         }
 742         clean_fname(thisname);
 743         if (sanitize_paths)
 744                 sanitize_path(thisname, NULL);
 745
 746         memset(sum, 0, SUM_LENGTH);
 747
 748         if (readlink_stat(thisname, &st, linkname) != 0) {
 749                 int save_errno = errno;
 750                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 751                         /* either symlink pointing nowhere or file that
 752                          * was removed during rsync run; see if excluded
 753                          * before reporting an error */
 754                         if (check_exclude_file(thisname, 0, exclude_level)) {
 755                                 /* file is excluded anyway, ignore silently */
 756                                 return NULL;
 757                         }
 758                 }
 759                 io_error |= IOERR_GENERAL;
 760                 rprintf(FERROR, "readlink %s failed: %s\n",
 761                         full_fname(thisname), strerror(save_errno));
 762                 return NULL;
 763         }
 764
 765         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 766         if (exclude_level == NO_EXCLUDES)
 767                 goto skip_excludes;
 768
 769         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 770                 rprintf(FINFO, "skipping directory %s\n", thisname);
 771                 return NULL;
 772         }
 773
 774         /* We only care about directories because we need to avoid recursing
 775          * into a mount-point directory, not to avoid copying a symlinked
 776          * file if -L (or similar) was specified. */
 777         if (one_file_system && st.st_dev != filesystem_dev
 778             && S_ISDIR(st.st_mode))
 779                 flags |= FLAG_MOUNT_POINT;
 780
 781         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 782                 return NULL;
 783
 784         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 785                 return NULL;
 786
 787       skip_excludes:
 788
 789         if (verbose > 2) {
 790                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 791                         who_am_i(), thisname, exclude_level);
 792         }
 793
 794         if ((basename = strrchr(thisname, '/')) != NULL) {
 795                 dirname_len = ++basename - thisname; /* counts future '\0' */
 796                 if (lastdir_len == dirname_len - 1
 797                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 798                         dirname = lastdir;
 799                         dirname_len = 0; /* indicates no copy is needed */
 800                 } else
 801                         dirname = thisname;
 802         } else {
 803                 basename = thisname;
 804                 dirname = NULL;
 805                 dirname_len = 0;
 806         }
 807         basename_len = strlen(basename) + 1; /* count the '\0' */
 808
 809 #if SUPPORT_LINKS
 810         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 811 #else
 812         linkname_len = 0;
 813 #endif
 814
 815 #if SUPPORT_HARD_LINKS
 816         if (preserve_hard_links) {
 817                 if (protocol_version < 28) {
 818                         if (S_ISREG(st.st_mode))
 819                                 idev_len = sizeof (struct idev);
 820                         else
 821                                 idev_len = 0;
 822                 } else {
 823                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 824                                 idev_len = sizeof (struct idev);
 825                         else
 826                                 idev_len = 0;
 827                 }
 828         } else
 829 #endif
 830                 idev_len = 0;
 831
 832         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 833         file_struct_len = idev_len? sizeof file[0] : min_file_struct_len;
 834
 835         alloc_len = file_struct_len + dirname_len + basename_len
 836                   + linkname_len + sum_len + idev_len;
 837         if (!(bp = new_array(char, alloc_len)))
 838                 out_of_memory("receive_file_entry");
 839         file = (struct file_struct *)bp;
 840         memset(bp, 0, min_file_struct_len);
 841         bp += file_struct_len;
 842
 843         file->flags = flags;
 844         file->modtime = st.st_mtime;
 845         file->length = st.st_size;
 846         file->mode = st.st_mode;
 847         file->uid = st.st_uid;
 848         file->gid = st.st_gid;
 849
 850 #if SUPPORT_HARD_LINKS
 851         if (idev_len) {
 852                 file->link_u.idev = (struct idev *)bp;
 853                 bp += idev_len;
 854                 file->F_DEV = st.st_dev;
 855                 file->F_INODE = st.st_ino;
 856         }
 857 #endif
 858
 859         if (dirname_len) {
 860                 file->dirname = lastdir = bp;
 861                 lastdir_len = dirname_len - 1;
 862                 memcpy(bp, dirname, dirname_len - 1);
 863                 bp += dirname_len;
 864                 bp[-1] = '\0';
 865         } else if (dirname)
 866                 file->dirname = dirname;
 867
 868         file->basename = bp;
 869         memcpy(bp, basename, basename_len);
 870         bp += basename_len;
 871
 872 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 873         if (preserve_devices && IS_DEVICE(st.st_mode))
 874                 file->u.rdev = st.st_rdev;
 875 #endif
 876
 877 #if SUPPORT_LINKS
 878         if (linkname_len) {
 879                 file->u.link = bp;
 880                 memcpy(bp, linkname, linkname_len);
 881                 bp += linkname_len;
 882         }
 883 #endif
 884
 885         if (sum_len) {
 886                 file->u.sum = bp;
 887                 file_checksum(thisname, bp, st.st_size);
 888                 /*bp += sum_len;*/
 889         }
 890
 891         file->basedir = flist_dir;
 892
 893         if (!S_ISDIR(st.st_mode))
 894                 stats.total_size += st.st_size;
 895
 896         return file;
 897 }
 898
 899
 900 void send_file_name(int f, struct file_list *flist, char *fname,
 901                     int recursive, unsigned short base_flags)
 902 {
 903         struct file_struct *file;
 904         char fbuf[MAXPATHLEN];
 905         extern int delete_excluded;
 906
 907         /* f is set to -1 when calculating deletion file list */
 908         file = make_file(fname,
 909                          f == -1 && delete_excluded? SERVER_EXCLUDES
 910                                                    : ALL_EXCLUDES);
 911
 912         if (!file)
 913                 return;
 914
 915         maybe_emit_filelist_progress(flist);
 916
 917         flist_expand(flist);
 918
 919         if (write_batch)
 920                 file->flags |= FLAG_TOP_DIR;
 921
 922         if (file->basename[0]) {
 923                 flist->files[flist->count++] = file;
 924                 send_file_entry(file, f, base_flags);
 925         }
 926
 927         if (recursive && S_ISDIR(file->mode)
 928             && !(file->flags & FLAG_MOUNT_POINT)) {
 929                 struct exclude_struct **last_exclude_list = local_exclude_list;
 930                 send_directory(f, flist, f_name_to(file, fbuf));
 931                 local_exclude_list = last_exclude_list;
 932                 return;
 933         }
 934 }
 935
 936
 937 static void send_directory(int f, struct file_list *flist, char *dir)
 938 {
 939         DIR *d;
 940         struct dirent *di;
 941         char fname[MAXPATHLEN];
 942         unsigned int offset;
 943         char *p;
 944
 945         d = opendir(dir);
 946         if (!d) {
 947                 io_error |= IOERR_GENERAL;
 948                 rprintf(FERROR, "opendir %s failed: %s\n",
 949                         full_fname(dir), strerror(errno));
 950                 return;
 951         }
 952
 953         offset = strlcpy(fname, dir, MAXPATHLEN);
 954         p = fname + offset;
 955         if (offset >= MAXPATHLEN || p[-1] != '/') {
 956                 if (offset >= MAXPATHLEN - 1) {
 957                         io_error |= IOERR_GENERAL;
 958                         rprintf(FERROR, "skipping long-named directory: %s\n",
 959                                 full_fname(fname));
 960                         closedir(d);
 961                         return;
 962                 }
 963                 *p++ = '/';
 964                 offset++;
 965         }
 966
 967         local_exclude_list = NULL;
 968
 969         if (cvs_exclude) {
 970                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 971                     < MAXPATHLEN - offset)
 972                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 973                 else {
 974                         io_error |= IOERR_GENERAL;
 975                         rprintf(FINFO,
 976                                 "cannot cvs-exclude in long-named directory %s\n",
 977                                 full_fname(fname));
 978                 }
 979         }
 980
 981         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 982                 char *dname = d_name(di);
 983                 if (dname[0] == '.' && (dname[1] == '\0'
 984                     || (dname[1] == '.' && dname[2] == '\0')))
 985                         continue;
 986                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 987                         send_file_name(f, flist, fname, recurse, 0);
 988                 else {
 989                         io_error |= IOERR_GENERAL;
 990                         rprintf(FINFO,
 991                                 "cannot send long-named file %s\n",
 992                                 full_fname(fname));
 993                 }
 994         }
 995         if (errno) {
 996                 io_error |= IOERR_GENERAL;
 997                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 998                         dir, errno, strerror(errno));
 999         }
1000
1001         if (local_exclude_list)
1002                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1003
1004         closedir(d);
1005 }
1006
1007
1008 /**
1009  * The delete_files() function in receiver.c sets f to -1 so that we just
1010  * construct the file list in memory without sending it over the wire.  It
1011  * also has the side-effect of ignoring user-excludes if delete_excluded
1012  * is set (so that the delete list includes user-excluded files).
1013  **/
1014 struct file_list *send_file_list(int f, int argc, char *argv[])
1015 {
1016         int l;
1017         STRUCT_STAT st;
1018         char *p, *dir, olddir[sizeof curr_dir];
1019         char lastpath[MAXPATHLEN] = "";
1020         struct file_list *flist;
1021         int64 start_write;
1022         int use_ff_fd = 0;
1023
1024         if (show_filelist_p() && f != -1)
1025                 start_filelist_progress("building file list");
1026
1027         start_write = stats.total_written;
1028
1029         flist = flist_new();
1030
1031         if (f != -1) {
1032                 io_start_buffering_out(f);
1033                 if (filesfrom_fd >= 0) {
1034                         if (argv[0] && !push_dir(argv[0])) {
1035                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1036                                         full_fname(argv[0]), strerror(errno));
1037                                 exit_cleanup(RERR_FILESELECT);
1038                         }
1039                         use_ff_fd = 1;
1040                 }
1041         }
1042
1043         while (1) {
1044                 char fname2[MAXPATHLEN];
1045                 char *fname = fname2;
1046
1047                 if (use_ff_fd) {
1048                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1049                                 break;
1050                         sanitize_path(fname, NULL);
1051                 } else {
1052                         if (argc-- == 0)
1053                                 break;
1054                         strlcpy(fname, *argv++, MAXPATHLEN);
1055                         if (sanitize_paths)
1056                                 sanitize_path(fname, NULL);
1057                 }
1058
1059                 l = strlen(fname);
1060                 if (fname[l - 1] == '/') {
1061                         if (l == 2 && fname[0] == '.') {
1062                                 /* Turn "./" into just "." rather than "./." */
1063                                 fname[1] = '\0';
1064                         } else if (l < MAXPATHLEN) {
1065                                 fname[l++] = '.';
1066                                 fname[l] = '\0';
1067                         }
1068                 }
1069
1070                 if (link_stat(fname, &st) != 0) {
1071                         if (f != -1) {
1072                                 io_error |= IOERR_GENERAL;
1073                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1074                                         full_fname(fname), strerror(errno));
1075                         }
1076                         continue;
1077                 }
1078
1079                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1080                         rprintf(FINFO, "skipping directory %s\n", fname);
1081                         continue;
1082                 }
1083
1084                 dir = NULL;
1085                 olddir[0] = '\0';
1086
1087                 if (!relative_paths) {
1088                         p = strrchr(fname, '/');
1089                         if (p) {
1090                                 *p = 0;
1091                                 if (p == fname)
1092                                         dir = "/";
1093                                 else
1094                                         dir = fname;
1095                                 fname = p + 1;
1096                         }
1097                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1098                         /* this ensures we send the intermediate directories,
1099                            thus getting their permissions right */
1100                         char *lp = lastpath, *fn = fname, *slash = fname;
1101                         *p = 0;
1102                         /* Skip any initial directories in our path that we
1103                          * have in common with lastpath. */
1104                         while (*fn && *lp == *fn) {
1105                                 if (*fn == '/')
1106                                         slash = fn;
1107                                 lp++, fn++;
1108                         }
1109                         *p = '/';
1110                         if (fn != p || (*lp && *lp != '/')) {
1111                                 int copy_links_saved = copy_links;
1112                                 int recurse_saved = recurse;
1113                                 copy_links = copy_unsafe_links;
1114                                 /* set recurse to 1 to prevent make_file
1115                                  * from ignoring directory, but still
1116                                  * turn off the recursive parameter to
1117                                  * send_file_name */
1118                                 recurse = 1;
1119                                 while ((slash = strchr(slash+1, '/')) != 0) {
1120                                         *slash = 0;
1121                                         send_file_name(f, flist, fname, 0, 0);
1122                                         *slash = '/';
1123                                 }
1124                                 copy_links = copy_links_saved;
1125                                 recurse = recurse_saved;
1126                                 *p = 0;
1127                                 strlcpy(lastpath, fname, sizeof lastpath);
1128                                 *p = '/';
1129                         }
1130                 }
1131
1132                 if (!*fname)
1133                         fname = ".";
1134
1135                 if (dir && *dir) {
1136                         static char *lastdir;
1137                         static int lastdir_len;
1138
1139                         strcpy(olddir, curr_dir); /* can't overflow */
1140
1141                         if (!push_dir(dir)) {
1142                                 io_error |= IOERR_GENERAL;
1143                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1144                                         full_fname(dir), strerror(errno));
1145                                 continue;
1146                         }
1147
1148                         if (lastdir && strcmp(lastdir, dir) == 0) {
1149                                 flist_dir = lastdir;
1150                                 flist_dir_len = lastdir_len;
1151                         } else {
1152                                 flist_dir = lastdir = strdup(dir);
1153                                 flist_dir_len = lastdir_len = strlen(dir);
1154                         }
1155                 }
1156
1157                 if (one_file_system)
1158                         set_filesystem(fname);
1159
1160                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1161
1162                 if (olddir[0]) {
1163                         flist_dir = NULL;
1164                         flist_dir_len = 0;
1165                         if (!pop_dir(olddir)) {
1166                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1167                                         full_fname(dir), strerror(errno));
1168                                 exit_cleanup(RERR_FILESELECT);
1169                         }
1170                 }
1171         }
1172
1173         if (f != -1) {
1174                 send_file_entry(NULL, f, 0);
1175
1176                 if (show_filelist_p())
1177                         finish_filelist_progress(flist);
1178         }
1179
1180         clean_flist(flist, 0, 0);
1181
1182         if (f != -1) {
1183                 /* Now send the uid/gid list. This was introduced in
1184                  * protocol version 15 */
1185                 send_uid_list(f);
1186
1187                 /* send the io_error flag */
1188                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1189
1190                 io_end_buffering();
1191                 stats.flist_size = stats.total_written - start_write;
1192                 stats.num_files = flist->count;
1193                 if (write_batch)
1194                         write_batch_flist_info(flist->count, flist->files);
1195         }
1196
1197         if (verbose > 3)
1198                 output_flist(flist);
1199
1200         if (verbose > 2)
1201                 rprintf(FINFO, "send_file_list done\n");
1202
1203         return flist;
1204 }
1205
1206
1207 struct file_list *recv_file_list(int f)
1208 {
1209         struct file_list *flist;
1210         unsigned short flags;
1211         int64 start_read;
1212         extern int list_only;
1213
1214         if (show_filelist_p())
1215                 start_filelist_progress("receiving file list");
1216
1217         start_read = stats.total_read;
1218
1219         flist = new(struct file_list);
1220         if (!flist)
1221                 goto oom;
1222
1223         flist->count = 0;
1224         flist->malloced = 1000;
1225         flist->files = new_array(struct file_struct *, flist->malloced);
1226         if (!flist->files)
1227                 goto oom;
1228
1229
1230         while ((flags = read_byte(f)) != 0) {
1231                 int i = flist->count;
1232
1233                 flist_expand(flist);
1234
1235                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1236                         flags |= read_byte(f) << 8;
1237                 receive_file_entry(&flist->files[i], flags, f);
1238
1239                 if (S_ISREG(flist->files[i]->mode))
1240                         stats.total_size += flist->files[i]->length;
1241
1242                 flist->count++;
1243
1244                 maybe_emit_filelist_progress(flist);
1245
1246                 if (verbose > 2) {
1247                         rprintf(FINFO, "recv_file_name(%s)\n",
1248                                 f_name(flist->files[i]));
1249                 }
1250         }
1251         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1252
1253         if (verbose > 2)
1254                 rprintf(FINFO, "received %d names\n", flist->count);
1255
1256         if (show_filelist_p())
1257                 finish_filelist_progress(flist);
1258
1259         clean_flist(flist, relative_paths, 1);
1260
1261         if (f != -1) {
1262                 /* Now send the uid/gid list. This was introduced in
1263                  * protocol version 15 */
1264                 recv_uid_list(f, flist);
1265
1266                 if (!read_batch) {
1267                         /* Recv the io_error flag */
1268                         if (lp_ignore_errors(module_id) || ignore_errors)
1269                                 read_int(f);
1270                         else
1271                                 io_error |= read_int(f);
1272                 }
1273         }
1274
1275         if (verbose > 3)
1276                 output_flist(flist);
1277
1278         if (list_only) {
1279                 int i;
1280                 for (i = 0; i < flist->count; i++)
1281                         list_file_entry(flist->files[i]);
1282         }
1283
1284         if (verbose > 2)
1285                 rprintf(FINFO, "recv_file_list done\n");
1286
1287         stats.flist_size = stats.total_read - start_read;
1288         stats.num_files = flist->count;
1289
1290         return flist;
1291
1292       oom:
1293         out_of_memory("recv_file_list");
1294         return NULL;            /* not reached */
1295 }
1296
1297
1298 int file_compare(struct file_struct **file1, struct file_struct **file2)
1299 {
1300         struct file_struct *f1 = *file1;
1301         struct file_struct *f2 = *file2;
1302
1303         if (!f1->basename && !f2->basename)
1304                 return 0;
1305         if (!f1->basename)
1306                 return -1;
1307         if (!f2->basename)
1308                 return 1;
1309         if (f1->dirname == f2->dirname)
1310                 return u_strcmp(f1->basename, f2->basename);
1311         return f_name_cmp(f1, f2);
1312 }
1313
1314
1315 int flist_find(struct file_list *flist, struct file_struct *f)
1316 {
1317         int low = 0, high = flist->count - 1;
1318
1319         while (high >= 0 && !flist->files[high]->basename) high--;
1320
1321         if (high < 0)
1322                 return -1;
1323
1324         while (low != high) {
1325                 int mid = (low + high) / 2;
1326                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1327                 if (ret == 0)
1328                         return flist_up(flist, mid);
1329                 if (ret > 0)
1330                         high = mid;
1331                 else
1332                         low = mid + 1;
1333         }
1334
1335         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1336                 return flist_up(flist, low);
1337         return -1;
1338 }
1339
1340
1341 /*
1342  * Free up any resources a file_struct has allocated, and optionally free
1343  * it up as well.
1344  */
1345 void free_file(struct file_struct *file, int free_the_struct)
1346 {
1347         if (free_the_struct)
1348                 free(file);
1349         else
1350                 memset(file, 0, min_file_struct_len);
1351 }
1352
1353
1354 /*
1355  * allocate a new file list
1356  */
1357 struct file_list *flist_new(void)
1358 {
1359         struct file_list *flist;
1360
1361         flist = new(struct file_list);
1362         if (!flist)
1363                 out_of_memory("send_file_list");
1364
1365         flist->count = 0;
1366         flist->malloced = 0;
1367         flist->files = NULL;
1368
1369         return flist;
1370 }
1371
1372 /*
1373  * free up all elements in a flist
1374  */
1375 void flist_free(struct file_list *flist)
1376 {
1377         int i;
1378         for (i = 1; i < flist->count; i++)
1379                 free_file(flist->files[i], FREE_STRUCT);
1380         free(flist->files);
1381         free(flist);
1382 }
1383
1384
1385 /*
1386  * This routine ensures we don't have any duplicate names in our file list.
1387  * duplicate names can cause corruption because of the pipelining
1388  */
1389 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1390 {
1391         int i, prev_i = 0;
1392
1393         if (!flist || flist->count == 0)
1394                 return;
1395
1396         qsort(flist->files, flist->count,
1397               sizeof flist->files[0], (int (*)()) file_compare);
1398
1399         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1400                 if (flist->files[i]->basename) {
1401                         prev_i = i;
1402                         break;
1403                 }
1404         }
1405         while (++i < flist->count) {
1406                 if (!flist->files[i]->basename)
1407                         continue;
1408                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1409                         if (verbose > 1 && !am_server) {
1410                                 rprintf(FINFO,
1411                                         "removing duplicate name %s from file list %d\n",
1412                                         f_name(flist->files[i]), i);
1413                         }
1414                         /* Make sure that if we unduplicate '.', that we don't
1415                          * lose track of a user-specified starting point (or
1416                          * else deletions will mysteriously fail with -R). */
1417                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1418                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1419                         free_file(flist->files[i], CLEAR_STRUCT);
1420                 } else
1421                         prev_i = i;
1422         }
1423
1424         if (strip_root) {
1425                 /* we need to strip off the root directory in the case
1426                    of relative paths, but this must be done _after_
1427                    the sorting phase */
1428                 for (i = 0; i < flist->count; i++) {
1429                         if (flist->files[i]->dirname &&
1430                             flist->files[i]->dirname[0] == '/') {
1431                                 memmove(&flist->files[i]->dirname[0],
1432                                         &flist->files[i]->dirname[1],
1433                                         strlen(flist->files[i]->dirname));
1434                         }
1435
1436                         if (flist->files[i]->dirname &&
1437                             !flist->files[i]->dirname[0]) {
1438                                 flist->files[i]->dirname = NULL;
1439                         }
1440                 }
1441         }
1442 }
1443
1444 static void output_flist(struct file_list *flist)
1445 {
1446         char uidbuf[16], gidbuf[16];
1447         struct file_struct *file;
1448         int i;
1449
1450         for (i = 0; i < flist->count; i++) {
1451                 file = flist->files[i];
1452                 if (am_root && preserve_uid)
1453                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1454                 else
1455                         *uidbuf = '\0';
1456                 if (preserve_gid && file->gid != GID_NONE)
1457                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1458                 else
1459                         *gidbuf = '\0';
1460                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1461                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1462                         NS(file->basename), (int) file->mode,
1463                         (double) file->length, uidbuf, gidbuf);
1464         }
1465 }
1466
1467
1468 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1469
1470 /* Compare the names of two file_struct entities, just like strcmp()
1471  * would do if it were operating on the joined strings.  We assume
1472  * that there are no 0-length strings.
1473  */
1474 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1475 {
1476         int dif;
1477         const uchar *c1, *c2;
1478         enum fnc_state state1, state2;
1479
1480         if (!f1 || !f1->basename) {
1481                 if (!f2 || !f2->basename)
1482                         return 0;
1483                 return -1;
1484         }
1485         if (!f2 || !f2->basename)
1486                 return 1;
1487
1488         if (!(c1 = (uchar*)f1->dirname)) {
1489                 state1 = fnc_BASE;
1490                 c1 = (uchar*)f1->basename;
1491         } else
1492                 state1 = fnc_DIR;
1493         if (!(c2 = (uchar*)f2->dirname)) {
1494                 state2 = fnc_BASE;
1495                 c2 = (uchar*)f2->basename;
1496         } else
1497                 state2 = fnc_DIR;
1498
1499         while (1) {
1500                 if ((dif = (int)*c1 - (int)*c2) != 0)
1501                         break;
1502                 if (!*++c1) {
1503                         switch (state1) {
1504                         case fnc_DIR:
1505                                 state1 = fnc_SLASH;
1506                                 c1 = (uchar*)"/";
1507                                 break;
1508                         case fnc_SLASH:
1509                                 state1 = fnc_BASE;
1510                                 c1 = (uchar*)f1->basename;
1511                                 break;
1512                         case fnc_BASE:
1513                                 break;
1514                         }
1515                 }
1516                 if (!*++c2) {
1517                         switch (state2) {
1518                         case fnc_DIR:
1519                                 state2 = fnc_SLASH;
1520                                 c2 = (uchar*)"/";
1521                                 break;
1522                         case fnc_SLASH:
1523                                 state2 = fnc_BASE;
1524                                 c2 = (uchar*)f2->basename;
1525                                 break;
1526                         case fnc_BASE:
1527                                 if (!*c1)
1528                                         return 0;
1529                                 break;
1530                         }
1531                 }
1532         }
1533
1534         return dif;
1535 }
1536
1537
1538 /* Return a copy of the full filename of a flist entry, using the indicated
1539  * buffer.  No size-checking is done because we checked the size when creating
1540  * the file_struct entry.
1541  */
1542 char *f_name_to(struct file_struct *f, char *fbuf)
1543 {
1544         if (!f || !f->basename)
1545                 return NULL;
1546
1547         if (f->dirname) {
1548                 int len = strlen(f->dirname);
1549                 memcpy(fbuf, f->dirname, len);
1550                 fbuf[len] = '/';
1551                 strcpy(fbuf + len + 1, f->basename);
1552         } else
1553                 strcpy(fbuf, f->basename);
1554         return fbuf;
1555 }
1556
1557
1558 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1559  */
1560 char *f_name(struct file_struct *f)
1561 {
1562         static char names[5][MAXPATHLEN];
1563         static unsigned int n;
1564
1565         n = (n + 1) % (sizeof names / sizeof names[0]);
1566
1567         return f_name_to(f, names[n]);
1568 }