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
  40 extern int cvs_exclude;
  41
  42 extern int recurse;
  43 extern char curr_dir[MAXPATHLEN];
  44 extern char *files_from;
  45 extern int filesfrom_fd;
  46
  47 extern int one_file_system;
  48 extern int make_backups;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_perms;
  52 extern int preserve_devices;
  53 extern int preserve_uid;
  54 extern int preserve_gid;
  55 extern int preserve_times;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int copy_links;
  59 extern int copy_unsafe_links;
  60 extern int protocol_version;
  61 extern int sanitize_paths;
  62
  63 extern int read_batch;
  64 extern int write_batch;
  65
  66 extern struct exclude_struct **exclude_list;
  67 extern struct exclude_struct **server_exclude_list;
  68 extern struct exclude_struct **local_exclude_list;
  69
  70 int io_error;
  71
  72 static char empty_sum[MD4_SUM_LENGTH];
  73 static unsigned int min_file_struct_len;
  74
  75 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  76
  77
  78 void init_flist(void)
  79 {
  80     struct file_struct f;
  81
  82     /* Figure out how big the file_struct is without trailing padding */
  83     min_file_struct_len = ((char*)&f.flags - (char*)&f) + sizeof f.flags;
  84 }
  85
  86
  87 static int show_filelist_p(void)
  88 {
  89         return verbose && (recurse || files_from) && !am_server;
  90 }
  91
  92 static void start_filelist_progress(char *kind)
  93 {
  94         rprintf(FINFO, "%s ... ", kind);
  95         if ((verbose > 1) || do_progress)
  96                 rprintf(FINFO, "\n");
  97         rflush(FINFO);
  98 }
  99
 100
 101 static void emit_filelist_progress(const struct file_list *flist)
 102 {
 103         rprintf(FINFO, " %d files...\r", flist->count);
 104 }
 105
 106
 107 static void maybe_emit_filelist_progress(const struct file_list *flist)
 108 {
 109         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 110                 emit_filelist_progress(flist);
 111 }
 112
 113
 114 static void finish_filelist_progress(const struct file_list *flist)
 115 {
 116         if (do_progress) {
 117                 /* This overwrites the progress line */
 118                 rprintf(FINFO, "%d file%sto consider\n",
 119                         flist->count, flist->count == 1 ? " " : "s ");
 120         } else
 121                 rprintf(FINFO, "done\n");
 122 }
 123
 124 void show_flist_stats(void)
 125 {
 126         /* Nothing yet */
 127 }
 128
 129
 130 static void list_file_entry(struct file_struct *f)
 131 {
 132         char perms[11];
 133
 134         if (!f->basename)
 135                 /* this can happen if duplicate names were removed */
 136                 return;
 137
 138         permstring(perms, f->mode);
 139
 140 #if SUPPORT_LINKS
 141         if (preserve_links && S_ISLNK(f->mode)) {
 142                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 143                         perms,
 144                         (double) f->length, timestring(f->modtime),
 145                         f_name(f), f->u.link);
 146         } else
 147 #endif
 148                 rprintf(FINFO, "%s %11.0f %s %s\n",
 149                         perms,
 150                         (double) f->length, timestring(f->modtime),
 151                         f_name(f));
 152 }
 153
 154
 155 /**
 156  * Stat either a symlink or its referent, depending on the settings of
 157  * copy_links, copy_unsafe_links, etc.
 158  *
 159  * @retval -1 on error
 160  *
 161  * @retval 0 for success
 162  *
 163  * @post If @p path is a symlink, then @p linkbuf (of size @c
 164  * MAXPATHLEN) contains the symlink target.
 165  *
 166  * @post @p buffer contains information about the link or the
 167  * referrent as appropriate, if they exist.
 168  **/
 169 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 170 {
 171 #if SUPPORT_LINKS
 172         if (copy_links)
 173                 return do_stat(path, buffer);
 174         if (do_lstat(path, buffer) == -1)
 175                 return -1;
 176         if (S_ISLNK(buffer->st_mode)) {
 177                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 178                 if (l == -1)
 179                         return -1;
 180                 linkbuf[l] = 0;
 181                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 182                         if (verbose > 1) {
 183                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 184                                         path, linkbuf);
 185                         }
 186                         return do_stat(path, buffer);
 187                 }
 188         }
 189         return 0;
 190 #else
 191         return do_stat(path, buffer);
 192 #endif
 193 }
 194
 195 int link_stat(const char *path, STRUCT_STAT * buffer)
 196 {
 197 #if SUPPORT_LINKS
 198         if (copy_links)
 199                 return do_stat(path, buffer);
 200         return do_lstat(path, buffer);
 201 #else
 202         return do_stat(path, buffer);
 203 #endif
 204 }
 205
 206 /*
 207  * This function is used to check if a file should be included/excluded
 208  * from the list of files based on its name and type etc.  The value of
 209  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 210  */
 211 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 212 {
 213 #if 0 /* This currently never happens, so avoid a useless compare. */
 214         if (exclude_level == NO_EXCLUDES)
 215                 return 0;
 216 #endif
 217         if (fname) {
 218                 /* never exclude '.', even if somebody does --exclude '*' */
 219                 if (fname[0] == '.' && !fname[1])
 220                         return 0;
 221                 /* Handle the -R version of the '.' dir. */
 222                 if (fname[0] == '/') {
 223                         int len = strlen(fname);
 224                         if (fname[len-1] == '.' && fname[len-2] == '/')
 225                                 return 0;
 226                 }
 227         }
 228         if (server_exclude_list
 229          && check_exclude(server_exclude_list, fname, is_dir))
 230                 return 1;
 231         if (exclude_level != ALL_EXCLUDES)
 232                 return 0;
 233         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 234                 return 1;
 235         if (local_exclude_list
 236          && check_exclude(local_exclude_list, fname, is_dir))
 237                 return 1;
 238         return 0;
 239 }
 240
 241 /* used by the one_file_system code */
 242 static dev_t filesystem_dev;
 243
 244 static void set_filesystem(char *fname)
 245 {
 246         STRUCT_STAT st;
 247         if (link_stat(fname, &st) != 0)
 248                 return;
 249         filesystem_dev = st.st_dev;
 250 }
 251
 252
 253 static int to_wire_mode(mode_t mode)
 254 {
 255 #if SUPPORT_LINKS
 256         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 257                 return (mode & ~(_S_IFMT)) | 0120000;
 258 #endif
 259         return (int) mode;
 260 }
 261
 262 static mode_t from_wire_mode(int mode)
 263 {
 264         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 265                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 266         return (mode_t) mode;
 267 }
 268
 269
 270 static void send_directory(int f, struct file_list *flist, char *dir);
 271
 272 static char *flist_dir;
 273 static int flist_dir_len;
 274
 275
 276 /**
 277  * Make sure @p flist is big enough to hold at least @p flist->count
 278  * entries.
 279  **/
 280 static void flist_expand(struct file_list *flist)
 281 {
 282         if (flist->count >= flist->malloced) {
 283                 void *new_ptr;
 284
 285                 if (flist->malloced < 1000)
 286                         flist->malloced += 1000;
 287                 else
 288                         flist->malloced *= 2;
 289
 290                 if (flist->files) {
 291                         new_ptr = realloc_array(flist->files,
 292                                                 struct file_struct *,
 293                                                 flist->malloced);
 294                 } else {
 295                         new_ptr = new_array(struct file_struct *,
 296                                             flist->malloced);
 297                 }
 298
 299                 if (verbose >= 2) {
 300                         rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 301                             who_am_i(),
 302                             (double) sizeof flist->files[0] * flist->malloced,
 303                             (new_ptr == flist->files) ? " not" : "");
 304                 }
 305
 306                 flist->files = (struct file_struct **) new_ptr;
 307
 308                 if (!flist->files)
 309                         out_of_memory("flist_expand");
 310         }
 311 }
 312
 313 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 314 {
 315         unsigned short flags;
 316         static time_t modtime;
 317         static mode_t mode;
 318         static DEV64_T rdev, rdev_high;
 319         static DEV64_T dev;
 320         static uid_t uid;
 321         static gid_t gid;
 322         static char lastname[MAXPATHLEN];
 323         char *fname, fbuf[MAXPATHLEN];
 324         int l1, l2;
 325
 326         if (f == -1)
 327                 return;
 328
 329         if (!file) {
 330                 write_byte(f, 0);
 331                 modtime = 0, mode = 0;
 332                 rdev = 0, rdev_high = 0, dev = 0;
 333                 uid = 0, gid = 0;
 334                 *lastname = '\0';
 335                 return;
 336         }
 337
 338         io_write_phase = "send_file_entry";
 339
 340         fname = f_name_to(file, fbuf);
 341
 342         flags = base_flags;
 343
 344         if (file->mode == mode)
 345                 flags |= XMIT_SAME_MODE;
 346         else
 347                 mode = file->mode;
 348         if (preserve_devices) {
 349                 if (protocol_version < 28) {
 350                         if (IS_DEVICE(mode)) {
 351                                 if (file->u.rdev == rdev) {
 352                                         /* Set both flags to simplify the test
 353                                          * when writing the data. */
 354                                         flags |= XMIT_SAME_RDEV_pre28
 355                                                | XMIT_SAME_HIGH_RDEV;
 356                                 } else
 357                                         rdev = file->u.rdev;
 358                         } else
 359                                 rdev = 0;
 360                 } else if (IS_DEVICE(mode)) {
 361                         if ((file->u.rdev & ~0xFF) == rdev_high)
 362                                 flags |= XMIT_SAME_HIGH_RDEV;
 363                         else {
 364                                 rdev = file->u.rdev;
 365                                 rdev_high = rdev & ~0xFF;
 366                         }
 367                 }
 368         }
 369         if (file->uid == uid)
 370                 flags |= XMIT_SAME_UID;
 371         else
 372                 uid = file->uid;
 373         if (file->gid == gid)
 374                 flags |= XMIT_SAME_GID;
 375         else
 376                 gid = file->gid;
 377         if (file->modtime == modtime)
 378                 flags |= XMIT_SAME_TIME;
 379         else
 380                 modtime = file->modtime;
 381
 382 #if SUPPORT_HARD_LINKS
 383         if (file->link_u.idev) {
 384                 if (file->F_DEV == dev) {
 385                         if (protocol_version >= 28)
 386                                 flags |= XMIT_SAME_DEV;
 387                 } else
 388                         dev = file->F_DEV;
 389                 flags |= XMIT_HAS_IDEV_DATA;
 390         }
 391 #endif
 392
 393         for (l1 = 0;
 394              lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 395              l1++) {}
 396         l2 = strlen(fname+l1);
 397
 398         if (l1 > 0)
 399                 flags |= XMIT_SAME_NAME;
 400         if (l2 > 255)
 401                 flags |= XMIT_LONG_NAME;
 402
 403         /* We must make sure we don't send a zero flag byte or the
 404          * other end will terminate the flist transfer.  Note that
 405          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 406          * it's harmless way to add a bit to the first flag byte. */
 407         if (protocol_version >= 28) {
 408                 if (!flags && !S_ISDIR(mode))
 409                         flags |= XMIT_TOP_DIR;
 410                 if ((flags & 0xFF00) || !flags) {
 411                         flags |= XMIT_EXTENDED_FLAGS;
 412                         write_byte(f, flags);
 413                         write_byte(f, flags >> 8);
 414                 } else
 415                         write_byte(f, flags);
 416         } else {
 417                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 418                         flags |= XMIT_TOP_DIR;
 419                 if (!(flags & 0xFF))
 420                         flags |= XMIT_LONG_NAME;
 421                 write_byte(f, flags);
 422         }
 423         if (flags & XMIT_SAME_NAME)
 424                 write_byte(f, l1);
 425         if (flags & XMIT_LONG_NAME)
 426                 write_int(f, l2);
 427         else
 428                 write_byte(f, l2);
 429         write_buf(f, fname + l1, l2);
 430
 431         write_longint(f, file->length);
 432         if (!(flags & XMIT_SAME_TIME))
 433                 write_int(f, modtime);
 434         if (!(flags & XMIT_SAME_MODE))
 435                 write_int(f, to_wire_mode(mode));
 436         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 437                 add_uid(uid);
 438                 write_int(f, uid);
 439         }
 440         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 441                 add_gid(gid);
 442                 write_int(f, gid);
 443         }
 444         if (preserve_devices && IS_DEVICE(mode)) {
 445                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 446                  * also off. */
 447                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 448                         write_int(f, rdev);
 449                 else if (protocol_version >= 28)
 450                         write_byte(f, rdev);
 451         }
 452
 453 #if SUPPORT_LINKS
 454         if (preserve_links && S_ISLNK(mode)) {
 455                 int len = strlen(file->u.link);
 456                 write_int(f, len);
 457                 write_buf(f, file->u.link, len);
 458         }
 459 #endif
 460
 461 #if SUPPORT_HARD_LINKS
 462         if (flags & XMIT_HAS_IDEV_DATA) {
 463                 if (protocol_version < 26) {
 464                         /* 32-bit dev_t and ino_t */
 465                         write_int(f, dev);
 466                         write_int(f, file->F_INODE);
 467                 } else {
 468                         /* 64-bit dev_t and ino_t */
 469                         if (!(flags & XMIT_SAME_DEV))
 470                                 write_longint(f, dev);
 471                         write_longint(f, file->F_INODE);
 472                 }
 473         }
 474 #endif
 475
 476         if (always_checksum) {
 477                 char *sum;
 478                 if (S_ISREG(mode))
 479                         sum = file->u.sum;
 480                 else if (protocol_version < 28) {
 481                         /* Prior to 28, we sent a useless set of nulls. */
 482                         sum = empty_sum;
 483                 } else
 484                         sum = NULL;
 485                 if (sum) {
 486                         write_buf(f, sum, protocol_version < 21? 2
 487                                                         : MD4_SUM_LENGTH);
 488                 }
 489         }
 490
 491         strlcpy(lastname, fname, MAXPATHLEN);
 492
 493         io_write_phase = "unknown";
 494 }
 495
 496
 497
 498 void receive_file_entry(struct file_struct **fptr, unsigned short flags, int f)
 499 {
 500         static time_t modtime;
 501         static mode_t mode;
 502         static DEV64_T rdev, rdev_high;
 503         static DEV64_T dev;
 504         static uid_t uid;
 505         static gid_t gid;
 506         static char lastname[MAXPATHLEN], *lastdir;
 507         static int lastdir_len = -1;
 508         char thisname[MAXPATHLEN];
 509         unsigned int l1 = 0, l2 = 0;
 510         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 511         int file_struct_len, idev_len;
 512         OFF_T file_length;
 513         char *basename, *dirname, *bp;
 514         struct file_struct *file;
 515
 516         if (!fptr) {
 517                 modtime = 0, mode = 0;
 518                 rdev = 0, rdev_high = 0, dev = 0;
 519                 uid = 0, gid = 0;
 520                 *lastname = '\0';
 521                 return;
 522         }
 523
 524         if (flags & XMIT_SAME_NAME)
 525                 l1 = read_byte(f);
 526
 527         if (flags & XMIT_LONG_NAME)
 528                 l2 = read_int(f);
 529         else
 530                 l2 = read_byte(f);
 531
 532         if (l2 >= MAXPATHLEN - l1) {
 533                 rprintf(FERROR,
 534                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 535                         flags, l1, l2, lastname);
 536                 overflow("receive_file_entry");
 537         }
 538
 539         strlcpy(thisname, lastname, l1 + 1);
 540         read_sbuf(f, &thisname[l1], l2);
 541         thisname[l1 + l2] = 0;
 542
 543         strlcpy(lastname, thisname, MAXPATHLEN);
 544
 545         clean_fname(thisname);
 546
 547         if (sanitize_paths)
 548                 sanitize_path(thisname, NULL);
 549
 550         if ((basename = strrchr(thisname, '/')) != NULL) {
 551                 dirname_len = ++basename - thisname; /* counts future '\0' */
 552                 if (lastdir_len == dirname_len - 1
 553                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 554                         dirname = lastdir;
 555                         dirname_len = 0; /* indicates no copy is needed */
 556                 } else
 557                         dirname = thisname;
 558         } else {
 559                 basename = thisname;
 560                 dirname = NULL;
 561                 dirname_len = 0;
 562         }
 563         basename_len = strlen(basename) + 1; /* count the '\0' */
 564
 565         file_length = read_longint(f);
 566         if (!(flags & XMIT_SAME_TIME))
 567                 modtime = (time_t)read_int(f);
 568         if (!(flags & XMIT_SAME_MODE))
 569                 mode = from_wire_mode(read_int(f));
 570
 571         if (preserve_uid && !(flags & XMIT_SAME_UID))
 572                 uid = (uid_t)read_int(f);
 573         if (preserve_gid && !(flags & XMIT_SAME_GID))
 574                 gid = (gid_t)read_int(f);
 575
 576         if (preserve_devices) {
 577                 if (protocol_version < 28) {
 578                         if (IS_DEVICE(mode)) {
 579                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 580                                         rdev = (DEV64_T)read_int(f);
 581                         } else
 582                                 rdev = 0;
 583                 } else if (IS_DEVICE(mode)) {
 584                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 585                                 rdev = (DEV64_T)read_int(f);
 586                                 rdev_high = rdev & ~0xFF;
 587                         } else
 588                                 rdev = rdev_high | (DEV64_T)read_byte(f);
 589                 }
 590         }
 591
 592 #if SUPPORT_LINKS
 593         if (preserve_links && S_ISLNK(mode)) {
 594                 linkname_len = read_int(f) + 1; /* count the '\0' */
 595                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 596                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 597                                 linkname_len - 1);
 598                         overflow("receive_file_entry");
 599                 }
 600         }
 601         else
 602 #endif
 603                 linkname_len = 0;
 604
 605 #if SUPPORT_HARD_LINKS
 606         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 607                 flags |= XMIT_HAS_IDEV_DATA;
 608         if (flags & XMIT_HAS_IDEV_DATA)
 609                 idev_len = sizeof (struct idev);
 610         else
 611 #endif
 612                 idev_len = 0;
 613
 614         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 615         file_struct_len = idev_len? sizeof file[0] : min_file_struct_len;
 616
 617         alloc_len = file_struct_len + dirname_len + basename_len
 618                   + linkname_len + sum_len + idev_len;
 619         if (!(bp = new_array(char, alloc_len)))
 620                 out_of_memory("receive_file_entry");
 621         file = *fptr = (struct file_struct *)bp;
 622         memset(bp, 0, min_file_struct_len);
 623         bp += file_struct_len;
 624
 625         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 626         file->modtime = modtime;
 627         file->length = file_length;
 628         file->mode = mode;
 629         file->uid = uid;
 630         file->gid = gid;
 631
 632 #if SUPPORT_HARD_LINKS
 633         if (idev_len) {
 634                 file->link_u.idev = (struct idev *)bp;
 635                 bp += idev_len;
 636         }
 637 #endif
 638
 639         if (dirname_len) {
 640                 file->dirname = lastdir = bp;
 641                 lastdir_len = dirname_len - 1;
 642                 memcpy(bp, dirname, dirname_len - 1);
 643                 bp += dirname_len;
 644                 bp[-1] = '\0';
 645         } else if (dirname)
 646                 file->dirname = dirname;
 647
 648         file->basename = bp;
 649         memcpy(bp, basename, basename_len);
 650         bp += basename_len;
 651
 652         if (preserve_devices && IS_DEVICE(mode))
 653                 file->u.rdev = rdev;
 654
 655 #if SUPPORT_LINKS
 656         if (linkname_len) {
 657                 file->u.link = bp;
 658                 read_sbuf(f, bp, linkname_len - 1);
 659                 if (sanitize_paths)
 660                         sanitize_path(bp, lastdir);
 661                 bp += linkname_len;
 662         }
 663 #endif
 664
 665 #if SUPPORT_HARD_LINKS
 666         if (idev_len) {
 667                 if (protocol_version < 26) {
 668                         dev = read_int(f);
 669                         file->F_INODE = read_int(f);
 670                 } else {
 671                         if (!(flags & XMIT_SAME_DEV))
 672                                 dev = read_longint(f);
 673                         file->F_INODE = read_longint(f);
 674                 }
 675                 file->F_DEV = dev;
 676         }
 677 #endif
 678
 679         if (always_checksum) {
 680                 char *sum;
 681                 if (sum_len) {
 682                         file->u.sum = sum = bp;
 683                         /*bp += sum_len;*/
 684                 } else if (protocol_version < 28) {
 685                         /* Prior to 28, we get a useless set of nulls. */
 686                         sum = empty_sum;
 687                 } else
 688                         sum = NULL;
 689                 if (sum) {
 690                         read_buf(f, sum, protocol_version < 21? 2
 691                                                 : MD4_SUM_LENGTH);
 692                 }
 693         }
 694
 695         if (!preserve_perms) {
 696                 extern int orig_umask;
 697                 /* set an appropriate set of permissions based on original
 698                  * permissions and umask. This emulates what GNU cp does */
 699                 file->mode &= ~orig_umask;
 700         }
 701 }
 702
 703
 704 /**
 705  * Create a file_struct for a named file by reading its stat()
 706  * information and performing extensive checks against global
 707  * options.
 708  *
 709  * @return the new file, or NULL if there was an error or this file
 710  * should be excluded.
 711  *
 712  * @todo There is a small optimization opportunity here to avoid
 713  * stat()ing the file in some circumstances, which has a certain cost.
 714  * We are called immediately after doing readdir(), and so we may
 715  * already know the d_type of the file.  We could for example avoid
 716  * statting directories if we're not recursing, but this is not a very
 717  * important case.  Some systems may not have d_type.
 718  **/
 719 struct file_struct *make_file(char *fname, int exclude_level)
 720 {
 721         static char *lastdir;
 722         static int lastdir_len = -1;
 723         struct file_struct *file;
 724         STRUCT_STAT st;
 725         char sum[SUM_LENGTH];
 726         char thisname[MAXPATHLEN];
 727         char linkname[MAXPATHLEN];
 728         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 729         int file_struct_len, idev_len;
 730         char *basename, *dirname, *bp;
 731         unsigned short flags = 0;
 732
 733         if (strlcpy(thisname, fname, sizeof thisname)
 734             >= sizeof thisname - flist_dir_len) {
 735                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 736                 return NULL;
 737         }
 738         clean_fname(thisname);
 739         if (sanitize_paths)
 740                 sanitize_path(thisname, NULL);
 741
 742         memset(sum, 0, SUM_LENGTH);
 743
 744         if (readlink_stat(thisname, &st, linkname) != 0) {
 745                 int save_errno = errno;
 746                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 747                         /* either symlink pointing nowhere or file that
 748                          * was removed during rsync run; see if excluded
 749                          * before reporting an error */
 750                         if (check_exclude_file(thisname, 0, exclude_level)) {
 751                                 /* file is excluded anyway, ignore silently */
 752                                 return NULL;
 753                         }
 754                 }
 755                 io_error |= IOERR_GENERAL;
 756                 rprintf(FERROR, "readlink %s failed: %s\n",
 757                         full_fname(thisname), strerror(save_errno));
 758                 return NULL;
 759         }
 760
 761         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 762         if (exclude_level == NO_EXCLUDES)
 763                 goto skip_excludes;
 764
 765         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 766                 rprintf(FINFO, "skipping directory %s\n", thisname);
 767                 return NULL;
 768         }
 769
 770         /* We only care about directories because we need to avoid recursing
 771          * into a mount-point directory, not to avoid copying a symlinked
 772          * file if -L (or similar) was specified. */
 773         if (one_file_system && st.st_dev != filesystem_dev
 774             && S_ISDIR(st.st_mode))
 775                 flags |= FLAG_MOUNT_POINT;
 776
 777         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 778                 return NULL;
 779
 780         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 781                 return NULL;
 782
 783       skip_excludes:
 784
 785         if (verbose > 2) {
 786                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 787                         who_am_i(), thisname, exclude_level);
 788         }
 789
 790         if ((basename = strrchr(thisname, '/')) != NULL) {
 791                 dirname_len = ++basename - thisname; /* counts future '\0' */
 792                 if (lastdir_len == dirname_len - 1
 793                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 794                         dirname = lastdir;
 795                         dirname_len = 0; /* indicates no copy is needed */
 796                 } else
 797                         dirname = thisname;
 798         } else {
 799                 basename = thisname;
 800                 dirname = NULL;
 801                 dirname_len = 0;
 802         }
 803         basename_len = strlen(basename) + 1; /* count the '\0' */
 804
 805 #if SUPPORT_LINKS
 806         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 807 #else
 808         linkname_len = 0;
 809 #endif
 810
 811 #if SUPPORT_HARD_LINKS
 812         if (preserve_hard_links) {
 813                 if (protocol_version < 28) {
 814                         if (S_ISREG(st.st_mode))
 815                                 idev_len = sizeof (struct idev);
 816                         else
 817                                 idev_len = 0;
 818                 } else {
 819                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 820                                 idev_len = sizeof (struct idev);
 821                         else
 822                                 idev_len = 0;
 823                 }
 824         } else
 825 #endif
 826                 idev_len = 0;
 827
 828         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 829         file_struct_len = idev_len? sizeof file[0] : min_file_struct_len;
 830
 831         alloc_len = file_struct_len + dirname_len + basename_len
 832                   + linkname_len + sum_len + idev_len;
 833         if (!(bp = new_array(char, alloc_len)))
 834                 out_of_memory("receive_file_entry");
 835         file = (struct file_struct *)bp;
 836         memset(bp, 0, min_file_struct_len);
 837         bp += file_struct_len;
 838
 839         file->flags = flags;
 840         file->modtime = st.st_mtime;
 841         file->length = st.st_size;
 842         file->mode = st.st_mode;
 843         file->uid = st.st_uid;
 844         file->gid = st.st_gid;
 845
 846 #if SUPPORT_HARD_LINKS
 847         if (idev_len) {
 848                 file->link_u.idev = (struct idev *)bp;
 849                 bp += idev_len;
 850                 file->F_DEV = st.st_dev;
 851                 file->F_INODE = st.st_ino;
 852         }
 853 #endif
 854
 855         if (dirname_len) {
 856                 file->dirname = lastdir = bp;
 857                 lastdir_len = dirname_len - 1;
 858                 memcpy(bp, dirname, dirname_len - 1);
 859                 bp += dirname_len;
 860                 bp[-1] = '\0';
 861         } else if (dirname)
 862                 file->dirname = dirname;
 863
 864         file->basename = bp;
 865         memcpy(bp, basename, basename_len);
 866         bp += basename_len;
 867
 868 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 869         if (preserve_devices && IS_DEVICE(st.st_mode))
 870                 file->u.rdev = st.st_rdev;
 871 #endif
 872
 873 #if SUPPORT_LINKS
 874         if (linkname_len) {
 875                 file->u.link = bp;
 876                 memcpy(bp, linkname, linkname_len);
 877                 bp += linkname_len;
 878         }
 879 #endif
 880
 881         if (sum_len) {
 882                 file->u.sum = bp;
 883                 file_checksum(thisname, bp, st.st_size);
 884                 /*bp += sum_len;*/
 885         }
 886
 887         file->basedir = flist_dir;
 888
 889         if (!S_ISDIR(st.st_mode))
 890                 stats.total_size += st.st_size;
 891
 892         return file;
 893 }
 894
 895
 896 void send_file_name(int f, struct file_list *flist, char *fname,
 897                     int recursive, unsigned short base_flags)
 898 {
 899         struct file_struct *file;
 900         char fbuf[MAXPATHLEN];
 901         extern int delete_excluded;
 902
 903         /* f is set to -1 when calculating deletion file list */
 904         file = make_file(fname,
 905                          f == -1 && delete_excluded? SERVER_EXCLUDES
 906                                                    : ALL_EXCLUDES);
 907
 908         if (!file)
 909                 return;
 910
 911         maybe_emit_filelist_progress(flist);
 912
 913         flist_expand(flist);
 914
 915         if (write_batch)
 916                 file->flags |= FLAG_TOP_DIR;
 917
 918         if (file->basename[0]) {
 919                 flist->files[flist->count++] = file;
 920                 send_file_entry(file, f, base_flags);
 921         }
 922
 923         if (recursive && S_ISDIR(file->mode)
 924             && !(file->flags & FLAG_MOUNT_POINT)) {
 925                 struct exclude_struct **last_exclude_list = local_exclude_list;
 926                 send_directory(f, flist, f_name_to(file, fbuf));
 927                 local_exclude_list = last_exclude_list;
 928                 return;
 929         }
 930 }
 931
 932
 933 static void send_directory(int f, struct file_list *flist, char *dir)
 934 {
 935         DIR *d;
 936         struct dirent *di;
 937         char fname[MAXPATHLEN];
 938         unsigned int offset;
 939         char *p;
 940
 941         d = opendir(dir);
 942         if (!d) {
 943                 io_error |= IOERR_GENERAL;
 944                 rprintf(FERROR, "opendir %s failed: %s\n",
 945                         full_fname(dir), strerror(errno));
 946                 return;
 947         }
 948
 949         offset = strlcpy(fname, dir, MAXPATHLEN);
 950         p = fname + offset;
 951         if (offset >= MAXPATHLEN || p[-1] != '/') {
 952                 if (offset >= MAXPATHLEN - 1) {
 953                         io_error |= IOERR_GENERAL;
 954                         rprintf(FERROR, "skipping long-named directory: %s\n",
 955                                 full_fname(fname));
 956                         closedir(d);
 957                         return;
 958                 }
 959                 *p++ = '/';
 960                 offset++;
 961         }
 962
 963         local_exclude_list = NULL;
 964
 965         if (cvs_exclude) {
 966                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 967                     < MAXPATHLEN - offset)
 968                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 969                 else {
 970                         io_error |= IOERR_GENERAL;
 971                         rprintf(FINFO,
 972                                 "cannot cvs-exclude in long-named directory %s\n",
 973                                 full_fname(fname));
 974                 }
 975         }
 976
 977         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 978                 char *dname = d_name(di);
 979                 if (dname[0] == '.' && (dname[1] == '\0'
 980                     || (dname[1] == '.' && dname[2] == '\0')))
 981                         continue;
 982                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 983                         send_file_name(f, flist, fname, recurse, 0);
 984                 else {
 985                         io_error |= IOERR_GENERAL;
 986                         rprintf(FINFO,
 987                                 "cannot send long-named file %s\n",
 988                                 full_fname(fname));
 989                 }
 990         }
 991         if (errno) {
 992                 io_error |= IOERR_GENERAL;
 993                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 994                         dir, errno, strerror(errno));
 995         }
 996
 997         if (local_exclude_list)
 998                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
 999
1000         closedir(d);
1001 }
1002
1003
1004 /**
1005  * The delete_files() function in receiver.c sets f to -1 so that we just
1006  * construct the file list in memory without sending it over the wire.  It
1007  * also has the side-effect of ignoring user-excludes if delete_excluded
1008  * is set (so that the delete list includes user-excluded files).
1009  **/
1010 struct file_list *send_file_list(int f, int argc, char *argv[])
1011 {
1012         int l;
1013         STRUCT_STAT st;
1014         char *p, *dir, olddir[sizeof curr_dir];
1015         char lastpath[MAXPATHLEN] = "";
1016         struct file_list *flist;
1017         int64 start_write;
1018         int use_ff_fd = 0;
1019
1020         if (show_filelist_p() && f != -1)
1021                 start_filelist_progress("building file list");
1022
1023         start_write = stats.total_written;
1024
1025         flist = flist_new();
1026
1027         if (f != -1) {
1028                 io_start_buffering_out(f);
1029                 if (filesfrom_fd >= 0) {
1030                         if (argv[0] && !push_dir(argv[0])) {
1031                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1032                                         full_fname(argv[0]), strerror(errno));
1033                                 exit_cleanup(RERR_FILESELECT);
1034                         }
1035                         use_ff_fd = 1;
1036                 }
1037         }
1038
1039         while (1) {
1040                 char fname2[MAXPATHLEN];
1041                 char *fname = fname2;
1042
1043                 if (use_ff_fd) {
1044                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1045                                 break;
1046                         sanitize_path(fname, NULL);
1047                 } else {
1048                         if (argc-- == 0)
1049                                 break;
1050                         strlcpy(fname, *argv++, MAXPATHLEN);
1051                         if (sanitize_paths)
1052                                 sanitize_path(fname, NULL);
1053                 }
1054
1055                 l = strlen(fname);
1056                 if (fname[l - 1] == '/') {
1057                         if (l == 2 && fname[0] == '.') {
1058                                 /* Turn "./" into just "." rather than "./." */
1059                                 fname[1] = '\0';
1060                         } else if (l < MAXPATHLEN) {
1061                                 fname[l++] = '.';
1062                                 fname[l] = '\0';
1063                         }
1064                 }
1065
1066                 if (link_stat(fname, &st) != 0) {
1067                         if (f != -1) {
1068                                 io_error |= IOERR_GENERAL;
1069                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1070                                         full_fname(fname), strerror(errno));
1071                         }
1072                         continue;
1073                 }
1074
1075                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1076                         rprintf(FINFO, "skipping directory %s\n", fname);
1077                         continue;
1078                 }
1079
1080                 dir = NULL;
1081                 olddir[0] = '\0';
1082
1083                 if (!relative_paths) {
1084                         p = strrchr(fname, '/');
1085                         if (p) {
1086                                 *p = 0;
1087                                 if (p == fname)
1088                                         dir = "/";
1089                                 else
1090                                         dir = fname;
1091                                 fname = p + 1;
1092                         }
1093                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1094                         /* this ensures we send the intermediate directories,
1095                            thus getting their permissions right */
1096                         char *lp = lastpath, *fn = fname, *slash = fname;
1097                         *p = 0;
1098                         /* Skip any initial directories in our path that we
1099                          * have in common with lastpath. */
1100                         while (*fn && *lp == *fn) {
1101                                 if (*fn == '/')
1102                                         slash = fn;
1103                                 lp++, fn++;
1104                         }
1105                         *p = '/';
1106                         if (fn != p || (*lp && *lp != '/')) {
1107                                 int copy_links_saved = copy_links;
1108                                 int recurse_saved = recurse;
1109                                 copy_links = copy_unsafe_links;
1110                                 /* set recurse to 1 to prevent make_file
1111                                  * from ignoring directory, but still
1112                                  * turn off the recursive parameter to
1113                                  * send_file_name */
1114                                 recurse = 1;
1115                                 while ((slash = strchr(slash+1, '/')) != 0) {
1116                                         *slash = 0;
1117                                         send_file_name(f, flist, fname, 0, 0);
1118                                         *slash = '/';
1119                                 }
1120                                 copy_links = copy_links_saved;
1121                                 recurse = recurse_saved;
1122                                 *p = 0;
1123                                 strlcpy(lastpath, fname, sizeof lastpath);
1124                                 *p = '/';
1125                         }
1126                 }
1127
1128                 if (!*fname)
1129                         fname = ".";
1130
1131                 if (dir && *dir) {
1132                         static char *lastdir;
1133                         static int lastdir_len;
1134
1135                         strcpy(olddir, curr_dir); /* can't overflow */
1136
1137                         if (!push_dir(dir)) {
1138                                 io_error |= IOERR_GENERAL;
1139                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1140                                         full_fname(dir), strerror(errno));
1141                                 continue;
1142                         }
1143
1144                         if (lastdir && strcmp(lastdir, dir) == 0) {
1145                                 flist_dir = lastdir;
1146                                 flist_dir_len = lastdir_len;
1147                         } else {
1148                                 flist_dir = lastdir = strdup(dir);
1149                                 flist_dir_len = lastdir_len = strlen(dir);
1150                         }
1151                 }
1152
1153                 if (one_file_system)
1154                         set_filesystem(fname);
1155
1156                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1157
1158                 if (olddir[0]) {
1159                         flist_dir = NULL;
1160                         flist_dir_len = 0;
1161                         if (!pop_dir(olddir)) {
1162                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1163                                         full_fname(dir), strerror(errno));
1164                                 exit_cleanup(RERR_FILESELECT);
1165                         }
1166                 }
1167         }
1168
1169         if (f != -1) {
1170                 send_file_entry(NULL, f, 0);
1171
1172                 if (show_filelist_p())
1173                         finish_filelist_progress(flist);
1174         }
1175
1176         clean_flist(flist, 0, 0);
1177
1178         if (f != -1) {
1179                 /* Now send the uid/gid list. This was introduced in
1180                  * protocol version 15 */
1181                 send_uid_list(f);
1182
1183                 /* send the io_error flag */
1184                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1185
1186                 io_end_buffering();
1187                 stats.flist_size = stats.total_written - start_write;
1188                 stats.num_files = flist->count;
1189                 if (write_batch)
1190                         write_batch_flist_info(flist->count, flist->files);
1191         }
1192
1193         if (verbose > 2)
1194                 rprintf(FINFO, "send_file_list done\n");
1195
1196         return flist;
1197 }
1198
1199
1200 struct file_list *recv_file_list(int f)
1201 {
1202         struct file_list *flist;
1203         unsigned short flags;
1204         int64 start_read;
1205         extern int list_only;
1206
1207         if (show_filelist_p())
1208                 start_filelist_progress("receiving file list");
1209
1210         start_read = stats.total_read;
1211
1212         flist = new(struct file_list);
1213         if (!flist)
1214                 goto oom;
1215
1216         flist->count = 0;
1217         flist->malloced = 1000;
1218         flist->files = new_array(struct file_struct *, flist->malloced);
1219         if (!flist->files)
1220                 goto oom;
1221
1222
1223         while ((flags = read_byte(f)) != 0) {
1224                 int i = flist->count;
1225
1226                 flist_expand(flist);
1227
1228                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1229                         flags |= read_byte(f) << 8;
1230                 receive_file_entry(&flist->files[i], flags, f);
1231
1232                 if (S_ISREG(flist->files[i]->mode))
1233                         stats.total_size += flist->files[i]->length;
1234
1235                 flist->count++;
1236
1237                 maybe_emit_filelist_progress(flist);
1238
1239                 if (verbose > 2) {
1240                         rprintf(FINFO, "recv_file_name(%s)\n",
1241                                 f_name(flist->files[i]));
1242                 }
1243         }
1244         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1245
1246         if (verbose > 2)
1247                 rprintf(FINFO, "received %d names\n", flist->count);
1248
1249         if (show_filelist_p())
1250                 finish_filelist_progress(flist);
1251
1252         clean_flist(flist, relative_paths, 1);
1253
1254         if (f != -1) {
1255                 /* Now send the uid/gid list. This was introduced in
1256                  * protocol version 15 */
1257                 recv_uid_list(f, flist);
1258
1259                 if (!read_batch) {
1260                         /* Recv the io_error flag */
1261                         if (lp_ignore_errors(module_id) || ignore_errors)
1262                                 read_int(f);
1263                         else
1264                                 io_error |= read_int(f);
1265                 }
1266         }
1267
1268         if (list_only) {
1269                 int i;
1270                 for (i = 0; i < flist->count; i++)
1271                         list_file_entry(flist->files[i]);
1272         }
1273
1274         if (verbose > 2)
1275                 rprintf(FINFO, "recv_file_list done\n");
1276
1277         stats.flist_size = stats.total_read - start_read;
1278         stats.num_files = flist->count;
1279
1280         return flist;
1281
1282       oom:
1283         out_of_memory("recv_file_list");
1284         return NULL;            /* not reached */
1285 }
1286
1287
1288 int file_compare(struct file_struct **file1, struct file_struct **file2)
1289 {
1290         struct file_struct *f1 = *file1;
1291         struct file_struct *f2 = *file2;
1292
1293         if (!f1->basename && !f2->basename)
1294                 return 0;
1295         if (!f1->basename)
1296                 return -1;
1297         if (!f2->basename)
1298                 return 1;
1299         if (f1->dirname == f2->dirname)
1300                 return u_strcmp(f1->basename, f2->basename);
1301         return f_name_cmp(f1, f2);
1302 }
1303
1304
1305 int flist_find(struct file_list *flist, struct file_struct *f)
1306 {
1307         int low = 0, high = flist->count - 1;
1308
1309         while (high >= 0 && !flist->files[high]->basename) high--;
1310
1311         if (high < 0)
1312                 return -1;
1313
1314         while (low != high) {
1315                 int mid = (low + high) / 2;
1316                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1317                 if (ret == 0)
1318                         return flist_up(flist, mid);
1319                 if (ret > 0)
1320                         high = mid;
1321                 else
1322                         low = mid + 1;
1323         }
1324
1325         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1326                 return flist_up(flist, low);
1327         return -1;
1328 }
1329
1330
1331 /*
1332  * Free up any resources a file_struct has allocated, and optionally free
1333  * it up as well.
1334  */
1335 void free_file(struct file_struct *file, int free_the_struct)
1336 {
1337         if (free_the_struct)
1338                 free(file);
1339         else
1340                 memset(file, 0, min_file_struct_len);
1341 }
1342
1343
1344 /*
1345  * allocate a new file list
1346  */
1347 struct file_list *flist_new(void)
1348 {
1349         struct file_list *flist;
1350
1351         flist = new(struct file_list);
1352         if (!flist)
1353                 out_of_memory("send_file_list");
1354
1355         flist->count = 0;
1356         flist->malloced = 0;
1357         flist->files = NULL;
1358
1359         return flist;
1360 }
1361
1362 /*
1363  * free up all elements in a flist
1364  */
1365 void flist_free(struct file_list *flist)
1366 {
1367         int i;
1368         for (i = 1; i < flist->count; i++)
1369                 free_file(flist->files[i], FREE_STRUCT);
1370         free(flist->files);
1371         free(flist);
1372 }
1373
1374
1375 /*
1376  * This routine ensures we don't have any duplicate names in our file list.
1377  * duplicate names can cause corruption because of the pipelining
1378  */
1379 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1380 {
1381         int i, prev_i = 0;
1382
1383         if (!flist || flist->count == 0)
1384                 return;
1385
1386         qsort(flist->files, flist->count,
1387               sizeof flist->files[0], (int (*)()) file_compare);
1388
1389         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1390                 if (flist->files[i]->basename) {
1391                         prev_i = i;
1392                         break;
1393                 }
1394         }
1395         while (++i < flist->count) {
1396                 if (!flist->files[i]->basename)
1397                         continue;
1398                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1399                         if (verbose > 1 && !am_server) {
1400                                 rprintf(FINFO,
1401                                         "removing duplicate name %s from file list %d\n",
1402                                         f_name(flist->files[i]), i);
1403                         }
1404                         /* Make sure that if we unduplicate '.', that we don't
1405                          * lose track of a user-specified starting point (or
1406                          * else deletions will mysteriously fail with -R). */
1407                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1408                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1409                         free_file(flist->files[i], CLEAR_STRUCT);
1410                 } else
1411                         prev_i = i;
1412         }
1413
1414         if (strip_root) {
1415                 /* we need to strip off the root directory in the case
1416                    of relative paths, but this must be done _after_
1417                    the sorting phase */
1418                 for (i = 0; i < flist->count; i++) {
1419                         if (flist->files[i]->dirname &&
1420                             flist->files[i]->dirname[0] == '/') {
1421                                 memmove(&flist->files[i]->dirname[0],
1422                                         &flist->files[i]->dirname[1],
1423                                         strlen(flist->files[i]->dirname));
1424                         }
1425
1426                         if (flist->files[i]->dirname &&
1427                             !flist->files[i]->dirname[0]) {
1428                                 flist->files[i]->dirname = NULL;
1429                         }
1430                 }
1431         }
1432
1433         if (verbose <= 3)
1434                 return;
1435
1436         for (i = 0; i < flist->count; i++) {
1437                 char uidbuf[16], gidbuf[16];
1438                 struct file_struct *file = flist->files[i];
1439                 if (am_root && preserve_uid)
1440                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1441                 else
1442                         *uidbuf = '\0';
1443                 if (preserve_gid)
1444                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1445                 else
1446                         *gidbuf = '\0';
1447                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1448                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1449                         NS(file->basename), (int) file->mode,
1450                         (double) file->length, uidbuf, gidbuf);
1451         }
1452 }
1453
1454
1455 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1456
1457 /* Compare the names of two file_struct entities, just like strcmp()
1458  * would do if it were operating on the joined strings.  We assume
1459  * that there are no 0-length strings.
1460  */
1461 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1462 {
1463         int dif;
1464         const uchar *c1, *c2;
1465         enum fnc_state state1, state2;
1466
1467         if (!f1 || !f1->basename) {
1468                 if (!f2 || !f2->basename)
1469                         return 0;
1470                 return -1;
1471         }
1472         if (!f2 || !f2->basename)
1473                 return 1;
1474
1475         if (!(c1 = (uchar*)f1->dirname)) {
1476                 state1 = fnc_BASE;
1477                 c1 = (uchar*)f1->basename;
1478         } else
1479                 state1 = fnc_DIR;
1480         if (!(c2 = (uchar*)f2->dirname)) {
1481                 state2 = fnc_BASE;
1482                 c2 = (uchar*)f2->basename;
1483         } else
1484                 state2 = fnc_DIR;
1485
1486         while (1) {
1487                 if ((dif = (int)*c1 - (int)*c2) != 0)
1488                         break;
1489                 if (!*++c1) {
1490                         switch (state1) {
1491                         case fnc_DIR:
1492                                 state1 = fnc_SLASH;
1493                                 c1 = (uchar*)"/";
1494                                 break;
1495                         case fnc_SLASH:
1496                                 state1 = fnc_BASE;
1497                                 c1 = (uchar*)f1->basename;
1498                                 break;
1499                         case fnc_BASE:
1500                                 break;
1501                         }
1502                 }
1503                 if (!*++c2) {
1504                         switch (state2) {
1505                         case fnc_DIR:
1506                                 state2 = fnc_SLASH;
1507                                 c2 = (uchar*)"/";
1508                                 break;
1509                         case fnc_SLASH:
1510                                 state2 = fnc_BASE;
1511                                 c2 = (uchar*)f2->basename;
1512                                 break;
1513                         case fnc_BASE:
1514                                 if (!*c1)
1515                                         return 0;
1516                                 break;
1517                         }
1518                 }
1519         }
1520
1521         return dif;
1522 }
1523
1524
1525 /* Return a copy of the full filename of a flist entry, using the indicated
1526  * buffer.  No size-checking is done because we checked the size when creating
1527  * the file_struct entry.
1528  */
1529 char *f_name_to(struct file_struct *f, char *fbuf)
1530 {
1531         if (!f || !f->basename)
1532                 return NULL;
1533
1534         if (f->dirname) {
1535                 int len = strlen(f->dirname);
1536                 memcpy(fbuf, f->dirname, len);
1537                 fbuf[len] = '/';
1538                 strcpy(fbuf + len + 1, f->basename);
1539         } else
1540                 strcpy(fbuf, f->basename);
1541         return fbuf;
1542 }
1543
1544
1545 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1546  */
1547 char *f_name(struct file_struct *f)
1548 {
1549         static char names[5][MAXPATHLEN];
1550         static unsigned int n;
1551
1552         n = (n + 1) % (sizeof names / sizeof names[0]);
1553
1554         return f_name_to(f, names[n]);
1555 }