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