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  * @todo Get rid of the string_area optimization.  Efficiently
  25  * allocating blocks is the responsibility of the system's malloc
  26  * library, not of rsync.
  27  *
  28  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
  29  *
  30  **/
  31
  32 #include "rsync.h"
  33
  34 extern struct stats stats;
  35
  36 extern int verbose;
  37 extern int do_progress;
  38 extern int am_server;
  39 extern int always_checksum;
  40 extern int module_id;
  41 extern int ignore_errors;
  42
  43 extern int cvs_exclude;
  44
  45 extern int recurse;
  46 extern char curr_dir[MAXPATHLEN];
  47 extern char *files_from;
  48 extern int filesfrom_fd;
  49
  50 extern int one_file_system;
  51 extern int make_backups;
  52 extern int preserve_links;
  53 extern int preserve_hard_links;
  54 extern int preserve_perms;
  55 extern int preserve_devices;
  56 extern int preserve_uid;
  57 extern int preserve_gid;
  58 extern int preserve_times;
  59 extern int relative_paths;
  60 extern int implied_dirs;
  61 extern int copy_links;
  62 extern int copy_unsafe_links;
  63 extern int protocol_version;
  64 extern int sanitize_paths;
  65
  66 extern int read_batch;
  67 extern int write_batch;
  68
  69 extern struct exclude_struct **exclude_list;
  70 extern struct exclude_struct **server_exclude_list;
  71 extern struct exclude_struct **local_exclude_list;
  72
  73 int io_error;
  74
  75 static struct file_struct null_file;
  76 static char empty_sum[MD4_SUM_LENGTH];
  77
  78 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  79
  80
  81 static int show_filelist_p(void)
  82 {
  83         return verbose && (recurse || files_from) && !am_server;
  84 }
  85
  86 static void start_filelist_progress(char *kind)
  87 {
  88         rprintf(FINFO, "%s ... ", kind);
  89         if ((verbose > 1) || do_progress)
  90                 rprintf(FINFO, "\n");
  91         rflush(FINFO);
  92 }
  93
  94
  95 static void emit_filelist_progress(const struct file_list *flist)
  96 {
  97         rprintf(FINFO, " %d files...\r", flist->count);
  98 }
  99
 100
 101 static void maybe_emit_filelist_progress(const struct file_list *flist)
 102 {
 103         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 104                 emit_filelist_progress(flist);
 105 }
 106
 107
 108 static void finish_filelist_progress(const struct file_list *flist)
 109 {
 110         if (do_progress) {
 111                 /* This overwrites the progress line */
 112                 rprintf(FINFO, "%d file%sto consider\n",
 113                         flist->count, flist->count == 1 ? " " : "s ");
 114         } else
 115                 rprintf(FINFO, "done\n");
 116 }
 117
 118 void show_flist_stats(void)
 119 {
 120         /* Nothing yet */
 121 }
 122
 123
 124 static struct string_area *string_area_new(int size)
 125 {
 126         struct string_area *a;
 127
 128         if (size <= 0)
 129                 size = ARENA_SIZE;
 130         a = new(struct string_area);
 131         if (!a)
 132                 out_of_memory("string_area_new");
 133         a->current = a->base = new_array(char, size);
 134         if (!a->current)
 135                 out_of_memory("string_area_new buffer");
 136         a->end = a->base + size;
 137         a->next = NULL;
 138
 139         return a;
 140 }
 141
 142 static void string_area_free(struct string_area *a)
 143 {
 144         struct string_area *next;
 145
 146         for (; a; a = next) {
 147                 next = a->next;
 148                 free(a->base);
 149         }
 150 }
 151
 152 static char *string_area_malloc(struct string_area **ap, int size)
 153 {
 154         char *p;
 155         struct string_area *a;
 156
 157         /* does the request fit into the current space? */
 158         a = *ap;
 159         if (a->current + size >= a->end) {
 160                 /* no; get space, move new string_area to front of the list */
 161                 a = string_area_new(size > ARENA_SIZE ? size : ARENA_SIZE);
 162                 a->next = *ap;
 163                 *ap = a;
 164         }
 165
 166         /* have space; do the "allocation." */
 167         p = a->current;
 168         a->current += size;
 169         return p;
 170 }
 171
 172 static char *string_area_strdup(struct string_area **ap, const char *src)
 173 {
 174         char *dest = string_area_malloc(ap, strlen(src) + 1);
 175         return strcpy(dest, src);
 176 }
 177
 178 static void list_file_entry(struct file_struct *f)
 179 {
 180         char perms[11];
 181
 182         if (!f->basename)
 183                 /* this can happen if duplicate names were removed */
 184                 return;
 185
 186         permstring(perms, f->mode);
 187
 188         if (preserve_links && S_ISLNK(f->mode)) {
 189                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 190                         perms,
 191                         (double) f->length, timestring(f->modtime),
 192                         f_name(f), f->u.link);
 193         } else {
 194                 rprintf(FINFO, "%s %11.0f %s %s\n",
 195                         perms,
 196                         (double) f->length, timestring(f->modtime),
 197                         f_name(f));
 198         }
 199 }
 200
 201
 202 /**
 203  * Stat either a symlink or its referent, depending on the settings of
 204  * copy_links, copy_unsafe_links, etc.
 205  *
 206  * @retval -1 on error
 207  *
 208  * @retval 0 for success
 209  *
 210  * @post If @p path is a symlink, then @p linkbuf (of size @c
 211  * MAXPATHLEN) contains the symlink target.
 212  *
 213  * @post @p buffer contains information about the link or the
 214  * referrent as appropriate, if they exist.
 215  **/
 216 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 217 {
 218 #if SUPPORT_LINKS
 219         if (copy_links)
 220                 return do_stat(path, buffer);
 221         if (do_lstat(path, buffer) == -1)
 222                 return -1;
 223         if (S_ISLNK(buffer->st_mode)) {
 224                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 225                 if (l == -1)
 226                         return -1;
 227                 linkbuf[l] = 0;
 228                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 229                         if (verbose > 1) {
 230                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 231                                         path, linkbuf);
 232                         }
 233                         return do_stat(path, buffer);
 234                 }
 235         }
 236         return 0;
 237 #else
 238         return do_stat(path, buffer);
 239 #endif
 240 }
 241
 242 int link_stat(const char *path, STRUCT_STAT * buffer)
 243 {
 244 #if SUPPORT_LINKS
 245         if (copy_links)
 246                 return do_stat(path, buffer);
 247         return do_lstat(path, buffer);
 248 #else
 249         return do_stat(path, buffer);
 250 #endif
 251 }
 252
 253 /*
 254  * This function is used to check if a file should be included/excluded
 255  * from the list of files based on its name and type etc.  The value of
 256  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 257  */
 258 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 259 {
 260 #if 0 /* This currently never happens, so avoid a useless compare. */
 261         if (exclude_level == NO_EXCLUDES)
 262                 return 0;
 263 #endif
 264         if (fname) {
 265                 /* never exclude '.', even if somebody does --exclude '*' */
 266                 if (fname[0] == '.' && !fname[1])
 267                         return 0;
 268                 /* Handle the -R version of the '.' dir. */
 269                 if (fname[0] == '/') {
 270                         int len = strlen(fname);
 271                         if (fname[len-1] == '.' && fname[len-2] == '/')
 272                                 return 0;
 273                 }
 274         }
 275         if (server_exclude_list
 276          && check_exclude(server_exclude_list, fname, is_dir))
 277                 return 1;
 278         if (exclude_level != ALL_EXCLUDES)
 279                 return 0;
 280         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 281                 return 1;
 282         if (local_exclude_list
 283          && check_exclude(local_exclude_list, fname, is_dir))
 284                 return 1;
 285         return 0;
 286 }
 287
 288 /* used by the one_file_system code */
 289 static dev_t filesystem_dev;
 290
 291 static void set_filesystem(char *fname)
 292 {
 293         STRUCT_STAT st;
 294         if (link_stat(fname, &st) != 0)
 295                 return;
 296         filesystem_dev = st.st_dev;
 297 }
 298
 299
 300 static int to_wire_mode(mode_t mode)
 301 {
 302         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 303                 return (mode & ~(_S_IFMT)) | 0120000;
 304         return (int) mode;
 305 }
 306
 307 static mode_t from_wire_mode(int mode)
 308 {
 309         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 310                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 311         return (mode_t) mode;
 312 }
 313
 314
 315 static void send_directory(int f, struct file_list *flist, char *dir);
 316
 317 static char *flist_dir;
 318 static int flist_dir_len;
 319
 320
 321 /**
 322  * Make sure @p flist is big enough to hold at least @p flist->count
 323  * entries.
 324  **/
 325 static void flist_expand(struct file_list *flist)
 326 {
 327         if (flist->count >= flist->malloced) {
 328                 void *new_ptr;
 329
 330                 if (flist->malloced < 1000)
 331                         flist->malloced += 1000;
 332                 else
 333                         flist->malloced *= 2;
 334
 335                 if (flist->files) {
 336                         new_ptr = realloc_array(flist->files,
 337                                                 struct file_struct *,
 338                                                 flist->malloced);
 339                 } else {
 340                         new_ptr = new_array(struct file_struct *,
 341                                             flist->malloced);
 342                 }
 343
 344                 if (verbose >= 2) {
 345                         rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 346                                 who_am_i(),
 347                                 (double)sizeof(flist->files[0])
 348                                 * flist->malloced,
 349                                 (new_ptr == flist->files) ? " not" : "");
 350                 }
 351
 352                 flist->files = (struct file_struct **) new_ptr;
 353
 354                 if (!flist->files)
 355                         out_of_memory("flist_expand");
 356         }
 357 }
 358
 359 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 360 {
 361         unsigned short flags;
 362         static time_t modtime;
 363         static mode_t mode;
 364         static DEV64_T rdev;    /* just high bytes in p28 onward */
 365         static DEV64_T dev;
 366         static uid_t uid;
 367         static gid_t gid;
 368         static char lastname[MAXPATHLEN];
 369         char *fname, fbuf[MAXPATHLEN];
 370         int l1, l2;
 371
 372         if (f == -1)
 373                 return;
 374
 375         if (!file) {
 376                 write_byte(f, 0);
 377                 modtime = 0, mode = 0;
 378                 rdev = 0, dev = 0;
 379                 uid = 0, gid = 0;
 380                 *lastname = '\0';
 381                 return;
 382         }
 383
 384         io_write_phase = "send_file_entry";
 385
 386         fname = f_name_to(file, fbuf);
 387
 388         flags = base_flags;
 389
 390         if (file->mode == mode)
 391                 flags |= XMIT_SAME_MODE;
 392         else
 393                 mode = file->mode;
 394         if (preserve_devices) {
 395                 if (protocol_version < 28) {
 396                         if (IS_DEVICE(mode)) {
 397                                 if (file->u.rdev == rdev) {
 398                                         /* Set both flags to simplify the test
 399                                          * when writing the data. */
 400                                         flags |= XMIT_SAME_RDEV_pre28
 401                                                | XMIT_SAME_HIGH_RDEV;
 402                                 } else
 403                                         rdev = file->u.rdev;
 404                         } else
 405                                 rdev = 0;
 406                 } else if (IS_DEVICE(mode)) {
 407                         if ((file->u.rdev & ~0xFF) == rdev)
 408                                 flags |= XMIT_SAME_HIGH_RDEV;
 409                         else
 410                                 rdev = file->u.rdev & ~0xFF;
 411                 }
 412         }
 413         if (file->uid == uid)
 414                 flags |= XMIT_SAME_UID;
 415         else
 416                 uid = file->uid;
 417         if (file->gid == gid)
 418                 flags |= XMIT_SAME_GID;
 419         else
 420                 gid = file->gid;
 421         if (file->modtime == modtime)
 422                 flags |= XMIT_SAME_TIME;
 423         else
 424                 modtime = file->modtime;
 425         if (file->link_u.idev) {
 426                 if (file->F_DEV == dev) {
 427                         if (protocol_version >= 28)
 428                                 flags |= XMIT_SAME_DEV;
 429                 } else
 430                         dev = file->F_DEV;
 431                 flags |= XMIT_HAS_IDEV_DATA;
 432         }
 433
 434         for (l1 = 0;
 435              lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 436              l1++) {}
 437         l2 = strlen(fname+l1);
 438
 439         if (l1 > 0)
 440                 flags |= XMIT_SAME_NAME;
 441         if (l2 > 255)
 442                 flags |= XMIT_LONG_NAME;
 443
 444         /* We must make sure we don't send a zero flag byte or the
 445          * other end will terminate the flist transfer.  Note that
 446          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 447          * it's harmless way to add a bit to the first flag byte. */
 448         if (protocol_version >= 28) {
 449                 if (!flags && !S_ISDIR(mode))
 450                         flags |= XMIT_TOP_DIR;
 451                 if ((flags & 0xFF00) || !flags) {
 452                         flags |= XMIT_EXTENDED_FLAGS;
 453                         write_byte(f, flags);
 454                         write_byte(f, flags >> 8);
 455                 } else
 456                         write_byte(f, flags);
 457         } else {
 458                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 459                         flags |= XMIT_TOP_DIR;
 460                 if (!(flags & 0xFF))
 461                         flags |= XMIT_LONG_NAME;
 462                 write_byte(f, flags);
 463         }
 464         if (flags & XMIT_SAME_NAME)
 465                 write_byte(f, l1);
 466         if (flags & XMIT_LONG_NAME)
 467                 write_int(f, l2);
 468         else
 469                 write_byte(f, l2);
 470         write_buf(f, fname + l1, l2);
 471
 472         write_longint(f, file->length);
 473         if (!(flags & XMIT_SAME_TIME))
 474                 write_int(f, modtime);
 475         if (!(flags & XMIT_SAME_MODE))
 476                 write_int(f, to_wire_mode(mode));
 477         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 478                 add_uid(uid);
 479                 write_int(f, uid);
 480         }
 481         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 482                 add_gid(gid);
 483                 write_int(f, gid);
 484         }
 485         if (preserve_devices && IS_DEVICE(mode)) {
 486                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 487                  * also off.  Also, avoid using "rdev" because it may be
 488                  * incomplete. */
 489                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 490                         write_int(f, file->u.rdev);
 491                 else if (protocol_version >= 28)
 492                         write_byte(f, file->u.rdev);
 493         }
 494
 495 #if SUPPORT_LINKS
 496         if (preserve_links && S_ISLNK(mode)) {
 497                 int len = strlen(file->u.link);
 498                 write_int(f, len);
 499                 write_buf(f, file->u.link, len);
 500         }
 501 #endif
 502
 503 #if SUPPORT_HARD_LINKS
 504         if (flags & XMIT_HAS_IDEV_DATA) {
 505                 if (protocol_version < 26) {
 506                         /* 32-bit dev_t and ino_t */
 507                         write_int(f, dev);
 508                         write_int(f, file->F_INODE);
 509                 } else {
 510                         /* 64-bit dev_t and ino_t */
 511                         if (!(flags & XMIT_SAME_DEV))
 512                                 write_longint(f, dev);
 513                         write_longint(f, file->F_INODE);
 514                 }
 515         }
 516 #endif
 517
 518         if (always_checksum) {
 519                 char *sum;
 520                 if (S_ISREG(mode))
 521                         sum = file->u.sum;
 522                 else if (protocol_version < 28) {
 523                         /* Prior to 28, we sent a useless set of nulls. */
 524                         sum = empty_sum;
 525                 } else
 526                         sum = NULL;
 527                 if (sum) {
 528                         write_buf(f, sum, protocol_version < 21? 2
 529                                                         : MD4_SUM_LENGTH);
 530                 }
 531         }
 532
 533         strlcpy(lastname, fname, MAXPATHLEN);
 534
 535         io_write_phase = "unknown";
 536 }
 537
 538
 539
 540 void receive_file_entry(struct file_struct **fptr, unsigned short flags, int f)
 541 {
 542         static time_t modtime;
 543         static mode_t mode;
 544         static DEV64_T rdev;    /* just high bytes in p28 onward */
 545         static DEV64_T dev;
 546         static uid_t uid;
 547         static gid_t gid;
 548         static char lastname[MAXPATHLEN];
 549         char thisname[MAXPATHLEN];
 550         unsigned int l1 = 0, l2 = 0;
 551         char *p;
 552         struct file_struct *file;
 553
 554         if (!fptr) {
 555                 modtime = 0, mode = 0;
 556                 rdev = 0, dev = 0;
 557                 uid = 0, gid = 0;
 558                 *lastname = '\0';
 559                 return;
 560         }
 561
 562         if (flags & XMIT_SAME_NAME)
 563                 l1 = read_byte(f);
 564
 565         if (flags & XMIT_LONG_NAME)
 566                 l2 = read_int(f);
 567         else
 568                 l2 = read_byte(f);
 569
 570         file = new(struct file_struct);
 571         if (!file)
 572                 out_of_memory("receive_file_entry");
 573         memset((char *) file, 0, sizeof(*file));
 574         (*fptr) = file;
 575
 576         if (l2 >= MAXPATHLEN - l1) {
 577                 rprintf(FERROR,
 578                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 579                         flags, l1, l2, lastname);
 580                 overflow("receive_file_entry");
 581         }
 582
 583         strlcpy(thisname, lastname, l1 + 1);
 584         read_sbuf(f, &thisname[l1], l2);
 585         thisname[l1 + l2] = 0;
 586
 587         strlcpy(lastname, thisname, MAXPATHLEN);
 588         lastname[MAXPATHLEN - 1] = 0;
 589
 590         clean_fname(thisname);
 591
 592         if (sanitize_paths) {
 593                 sanitize_path(thisname, NULL);
 594         }
 595
 596         if ((p = strrchr(thisname, '/'))) {
 597                 static char *lastdir;
 598                 *p = 0;
 599                 if (lastdir && strcmp(thisname, lastdir) == 0)
 600                         file->dirname = lastdir;
 601                 else {
 602                         file->dirname = strdup(thisname);
 603                         lastdir = file->dirname;
 604                 }
 605                 file->basename = strdup(p + 1);
 606         } else {
 607                 file->dirname = NULL;
 608                 file->basename = strdup(thisname);
 609         }
 610
 611         if (!file->basename)
 612                 out_of_memory("receive_file_entry 1");
 613
 614         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 615         file->length = read_longint(f);
 616         if (!(flags & XMIT_SAME_TIME))
 617                 modtime = (time_t)read_int(f);
 618         file->modtime = modtime;
 619         if (!(flags & XMIT_SAME_MODE))
 620                 mode = from_wire_mode(read_int(f));
 621         file->mode = mode;
 622
 623         if (preserve_uid) {
 624                 if (!(flags & XMIT_SAME_UID))
 625                         uid = (uid_t)read_int(f);
 626                 file->uid = uid;
 627         }
 628         if (preserve_gid) {
 629                 if (!(flags & XMIT_SAME_GID))
 630                         gid = (gid_t)read_int(f);
 631                 file->gid = gid;
 632         }
 633         if (preserve_devices) {
 634                 if (protocol_version < 28) {
 635                         if (IS_DEVICE(mode)) {
 636                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 637                                         rdev = (DEV64_T)read_int(f);
 638                                 file->u.rdev = rdev;
 639                         } else
 640                                 rdev = 0;
 641                 } else if (IS_DEVICE(mode)) {
 642                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 643                                 file->u.rdev = (DEV64_T)read_int(f);
 644                                 rdev = file->u.rdev & ~0xFF;
 645                         } else
 646                                 file->u.rdev = rdev | (DEV64_T)read_byte(f);
 647                 }
 648         }
 649
 650         if (preserve_links && S_ISLNK(mode)) {
 651                 int len = read_int(f);
 652                 if (len < 0 || len >= MAXPATHLEN) {
 653                         rprintf(FERROR, "overflow: len=%d\n", len);
 654                         overflow("receive_file_entry");
 655                 }
 656                 if (!(file->u.link = new_array(char, len + 1)))
 657                         out_of_memory("receive_file_entry 2");
 658                 read_sbuf(f, file->u.link, len);
 659                 if (sanitize_paths)
 660                         sanitize_path(file->u.link, file->dirname);
 661         }
 662 #if SUPPORT_HARD_LINKS
 663         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 664                 flags |= XMIT_HAS_IDEV_DATA;
 665         if (flags & XMIT_HAS_IDEV_DATA) {
 666                 if (!(file->link_u.idev = new(struct idev)))
 667                         out_of_memory("file inode data");
 668                 if (protocol_version < 26) {
 669                         dev = read_int(f);
 670                         file->F_INODE = read_int(f);
 671                 } else {
 672                         if (!(flags & XMIT_SAME_DEV))
 673                                 dev = read_longint(f);
 674                         file->F_INODE = read_longint(f);
 675                 }
 676                 file->F_DEV = dev;
 677         }
 678 #endif
 679
 680         if (always_checksum) {
 681                 char *sum;
 682                 if (S_ISREG(mode)) {
 683                         sum = file->u.sum = new_array(char, MD4_SUM_LENGTH);
 684                         if (!sum)
 685                                 out_of_memory("md4 sum");
 686                 } else if (protocol_version < 28) {
 687                         /* Prior to 28, we get a useless set of nulls. */
 688                         sum = empty_sum;
 689                 } else
 690                         sum = NULL;
 691                 if (sum) {
 692                         read_buf(f, sum, protocol_version < 21? 2
 693                                                 : MD4_SUM_LENGTH);
 694                 }
 695         }
 696
 697         if (!preserve_perms) {
 698                 extern int orig_umask;
 699                 /* set an appropriate set of permissions based on original
 700                  * permissions and umask. This emulates what GNU cp does */
 701                 file->mode &= ~orig_umask;
 702         }
 703 }
 704
 705
 706 #define STRDUP(ap, p)   (ap ? string_area_strdup(ap, p) : strdup(p))
 707 /* IRIX cc cares that the operands to the ternary have the same type. */
 708 #define MALLOC(ap, i)   (ap ? (void*) string_area_malloc(ap, i) : malloc(i))
 709
 710 /**
 711  * Create a file_struct for a named file by reading its stat()
 712  * information and performing extensive checks against global
 713  * options.
 714  *
 715  * @return the new file, or NULL if there was an error or this file
 716  * should be excluded.
 717  *
 718  * @todo There is a small optimization opportunity here to avoid
 719  * stat()ing the file in some circumstances, which has a certain cost.
 720  * We are called immediately after doing readdir(), and so we may
 721  * already know the d_type of the file.  We could for example avoid
 722  * statting directories if we're not recursing, but this is not a very
 723  * important case.  Some systems may not have d_type.
 724  **/
 725 struct file_struct *make_file(char *fname, struct string_area **ap,
 726                               int exclude_level)
 727 {
 728         struct file_struct *file;
 729         STRUCT_STAT st;
 730         char sum[SUM_LENGTH];
 731         char *p;
 732         char thisname[MAXPATHLEN];
 733         char linkname[MAXPATHLEN];
 734         unsigned short flags = 0;
 735
 736         if (strlcpy(thisname, fname, sizeof thisname)
 737             >= sizeof thisname - flist_dir_len) {
 738                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 739                 return NULL;
 740         }
 741         clean_fname(thisname);
 742         if (sanitize_paths)
 743                 sanitize_path(thisname, NULL);
 744
 745         memset(sum, 0, SUM_LENGTH);
 746
 747         if (readlink_stat(thisname, &st, linkname) != 0) {
 748                 int save_errno = errno;
 749                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 750                         /* either symlink pointing nowhere or file that
 751                          * was removed during rsync run; see if excluded
 752                          * before reporting an error */
 753                         if (check_exclude_file(thisname, 0, exclude_level)) {
 754                                 /* file is excluded anyway, ignore silently */
 755                                 return NULL;
 756                         }
 757                 }
 758                 io_error |= IOERR_GENERAL;
 759                 rprintf(FERROR, "readlink %s failed: %s\n",
 760                         full_fname(thisname), strerror(save_errno));
 761                 return NULL;
 762         }
 763
 764         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 765         if (exclude_level == NO_EXCLUDES)
 766                 goto skip_excludes;
 767
 768         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 769                 rprintf(FINFO, "skipping directory %s\n", thisname);
 770                 return NULL;
 771         }
 772
 773         if (one_file_system && st.st_dev != filesystem_dev) {
 774                 /* We allow a directory though to preserve the mount point.
 775                  * However, flag it so that we don't recurse. */
 776                 if (!S_ISDIR(st.st_mode))
 777                         return NULL;
 778                 flags |= FLAG_MOUNT_POINT;
 779         }
 780
 781         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 782                 return NULL;
 783
 784         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 785                 return NULL;
 786
 787       skip_excludes:
 788
 789         if (verbose > 2) {
 790                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 791                         who_am_i(), thisname, exclude_level);
 792         }
 793
 794         file = new(struct file_struct);
 795         if (!file)
 796                 out_of_memory("make_file");
 797         memset((char *) file, 0, sizeof(*file));
 798         file->flags = flags;
 799
 800         if ((p = strrchr(thisname, '/'))) {
 801                 static char *lastdir;
 802                 *p = 0;
 803                 if (lastdir && strcmp(thisname, lastdir) == 0)
 804                         file->dirname = lastdir;
 805                 else {
 806                         file->dirname = strdup(thisname);
 807                         lastdir = file->dirname;
 808                 }
 809                 file->basename = STRDUP(ap, p + 1);
 810                 *p = '/';
 811         } else {
 812                 file->dirname = NULL;
 813                 file->basename = STRDUP(ap, thisname);
 814         }
 815
 816         file->modtime = st.st_mtime;
 817         file->length = st.st_size;
 818         file->mode = st.st_mode;
 819         file->uid = st.st_uid;
 820         file->gid = st.st_gid;
 821         if (preserve_hard_links) {
 822                 if (protocol_version < 28 ? S_ISREG(st.st_mode)
 823                     : !S_ISDIR(st.st_mode) && st.st_nlink > 1) {
 824                         if (!(file->link_u.idev = new(struct idev)))
 825                                 out_of_memory("file inode data");
 826                         file->F_DEV = st.st_dev;
 827                         file->F_INODE = st.st_ino;
 828                 }
 829         }
 830 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 831         if (IS_DEVICE(st.st_mode))
 832                 file->u.rdev = st.st_rdev;
 833 #endif
 834
 835 #if SUPPORT_LINKS
 836         if (S_ISLNK(st.st_mode))
 837                 file->u.link = STRDUP(ap, linkname);
 838 #endif
 839
 840         if (always_checksum && S_ISREG(st.st_mode)) {
 841                 if (!(file->u.sum = (char*)MALLOC(ap, MD4_SUM_LENGTH)))
 842                         out_of_memory("md4 sum");
 843                 file_checksum(thisname, file->u.sum, st.st_size);
 844         }
 845
 846         file->basedir = flist_dir;
 847
 848         if (!S_ISDIR(st.st_mode))
 849                 stats.total_size += st.st_size;
 850
 851         return file;
 852 }
 853
 854
 855 void send_file_name(int f, struct file_list *flist, char *fname,
 856                     int recursive, unsigned short base_flags)
 857 {
 858         struct file_struct *file;
 859         char fbuf[MAXPATHLEN];
 860         extern int delete_excluded;
 861
 862         /* f is set to -1 when calculating deletion file list */
 863         file = make_file(fname, &flist->string_area,
 864                          f == -1 && delete_excluded? SERVER_EXCLUDES
 865                                                    : ALL_EXCLUDES);
 866
 867         if (!file)
 868                 return;
 869
 870         maybe_emit_filelist_progress(flist);
 871
 872         flist_expand(flist);
 873
 874         if (write_batch)
 875                 file->flags |= FLAG_TOP_DIR;
 876
 877         if (file->basename[0]) {
 878                 flist->files[flist->count++] = file;
 879                 send_file_entry(file, f, base_flags);
 880         }
 881
 882         if (recursive && S_ISDIR(file->mode)
 883             && !(file->flags & FLAG_MOUNT_POINT)) {
 884                 struct exclude_struct **last_exclude_list = local_exclude_list;
 885                 send_directory(f, flist, f_name_to(file, fbuf));
 886                 local_exclude_list = last_exclude_list;
 887                 return;
 888         }
 889 }
 890
 891
 892 static void send_directory(int f, struct file_list *flist, char *dir)
 893 {
 894         DIR *d;
 895         struct dirent *di;
 896         char fname[MAXPATHLEN];
 897         unsigned int offset;
 898         char *p;
 899
 900         d = opendir(dir);
 901         if (!d) {
 902                 io_error |= IOERR_GENERAL;
 903                 rprintf(FERROR, "opendir %s failed: %s\n",
 904                         full_fname(dir), strerror(errno));
 905                 return;
 906         }
 907
 908         offset = strlcpy(fname, dir, MAXPATHLEN);
 909         p = fname + offset;
 910         if (offset >= MAXPATHLEN || p[-1] != '/') {
 911                 if (offset >= MAXPATHLEN - 1) {
 912                         io_error |= IOERR_GENERAL;
 913                         rprintf(FERROR, "skipping long-named directory: %s\n",
 914                                 full_fname(fname));
 915                         closedir(d);
 916                         return;
 917                 }
 918                 *p++ = '/';
 919                 offset++;
 920         }
 921
 922         local_exclude_list = NULL;
 923
 924         if (cvs_exclude) {
 925                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 926                     < MAXPATHLEN - offset)
 927                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 928                 else {
 929                         io_error |= IOERR_GENERAL;
 930                         rprintf(FINFO,
 931                                 "cannot cvs-exclude in long-named directory %s\n",
 932                                 full_fname(fname));
 933                 }
 934         }
 935
 936         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 937                 char *dname = d_name(di);
 938                 if (dname[0] == '.' && (dname[1] == '\0'
 939                     || (dname[1] == '.' && dname[2] == '\0')))
 940                         continue;
 941                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 942                         send_file_name(f, flist, fname, recurse, 0);
 943                 else {
 944                         io_error |= IOERR_GENERAL;
 945                         rprintf(FINFO,
 946                                 "cannot send long-named file %s\n",
 947                                 full_fname(fname));
 948                 }
 949         }
 950         if (errno) {
 951                 io_error |= IOERR_GENERAL;
 952                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 953                         dir, errno, strerror(errno));
 954         }
 955
 956         if (local_exclude_list)
 957                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
 958
 959         closedir(d);
 960 }
 961
 962
 963 /**
 964  * The delete_files() function in receiver.c sets f to -1 so that we just
 965  * construct the file list in memory without sending it over the wire.  It
 966  * also has the side-effect of ignoring user-excludes if delete_excluded
 967  * is set (so that the delete list includes user-excluded files).
 968  **/
 969 struct file_list *send_file_list(int f, int argc, char *argv[])
 970 {
 971         int l;
 972         STRUCT_STAT st;
 973         char *p, *dir, olddir[sizeof curr_dir];
 974         char lastpath[MAXPATHLEN] = "";
 975         struct file_list *flist;
 976         int64 start_write;
 977         int use_ff_fd = 0;
 978
 979         if (show_filelist_p() && f != -1)
 980                 start_filelist_progress("building file list");
 981
 982         start_write = stats.total_written;
 983
 984         flist = flist_new();
 985
 986         if (f != -1) {
 987                 io_start_buffering_out(f);
 988                 if (filesfrom_fd >= 0) {
 989                         if (argv[0] && !push_dir(argv[0])) {
 990                                 rprintf(FERROR, "push_dir %s failed: %s\n",
 991                                         full_fname(argv[0]), strerror(errno));
 992                                 exit_cleanup(RERR_FILESELECT);
 993                         }
 994                         use_ff_fd = 1;
 995                 }
 996         }
 997
 998         while (1) {
 999                 char fname2[MAXPATHLEN];
1000                 char *fname = fname2;
1001
1002                 if (use_ff_fd) {
1003                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1004                                 break;
1005                         sanitize_path(fname, NULL);
1006                 } else {
1007                         if (argc-- == 0)
1008                                 break;
1009                         strlcpy(fname, *argv++, MAXPATHLEN);
1010                         if (sanitize_paths)
1011                                 sanitize_path(fname, NULL);
1012                 }
1013
1014                 l = strlen(fname);
1015                 if (fname[l - 1] == '/') {
1016                         if (l == 2 && fname[0] == '.') {
1017                                 /* Turn "./" into just "." rather than "./." */
1018                                 fname[1] = '\0';
1019                         } else if (l < MAXPATHLEN) {
1020                                 fname[l++] = '.';
1021                                 fname[l] = '\0';
1022                         }
1023                 }
1024
1025                 if (link_stat(fname, &st) != 0) {
1026                         if (f != -1) {
1027                                 io_error |= IOERR_GENERAL;
1028                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1029                                         full_fname(fname), strerror(errno));
1030                         }
1031                         continue;
1032                 }
1033
1034                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1035                         rprintf(FINFO, "skipping directory %s\n", fname);
1036                         continue;
1037                 }
1038
1039                 dir = NULL;
1040                 olddir[0] = '\0';
1041
1042                 if (!relative_paths) {
1043                         p = strrchr(fname, '/');
1044                         if (p) {
1045                                 *p = 0;
1046                                 if (p == fname)
1047                                         dir = "/";
1048                                 else
1049                                         dir = fname;
1050                                 fname = p + 1;
1051                         }
1052                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1053                         /* this ensures we send the intermediate directories,
1054                            thus getting their permissions right */
1055                         char *lp = lastpath, *fn = fname, *slash = fname;
1056                         *p = 0;
1057                         /* Skip any initial directories in our path that we
1058                          * have in common with lastpath. */
1059                         while (*fn && *lp == *fn) {
1060                                 if (*fn == '/')
1061                                         slash = fn;
1062                                 lp++, fn++;
1063                         }
1064                         *p = '/';
1065                         if (fn != p || (*lp && *lp != '/')) {
1066                                 int copy_links_saved = copy_links;
1067                                 int recurse_saved = recurse;
1068                                 copy_links = copy_unsafe_links;
1069                                 /* set recurse to 1 to prevent make_file
1070                                  * from ignoring directory, but still
1071                                  * turn off the recursive parameter to
1072                                  * send_file_name */
1073                                 recurse = 1;
1074                                 while ((slash = strchr(slash+1, '/')) != 0) {
1075                                         *slash = 0;
1076                                         send_file_name(f, flist, fname, 0, 0);
1077                                         *slash = '/';
1078                                 }
1079                                 copy_links = copy_links_saved;
1080                                 recurse = recurse_saved;
1081                                 *p = 0;
1082                                 strlcpy(lastpath, fname, sizeof lastpath);
1083                                 *p = '/';
1084                         }
1085                 }
1086
1087                 if (!*fname)
1088                         fname = ".";
1089
1090                 if (dir && *dir) {
1091                         static char *lastdir;
1092                         static int lastdir_len;
1093
1094                         strcpy(olddir, curr_dir); /* can't overflow */
1095
1096                         if (!push_dir(dir)) {
1097                                 io_error |= IOERR_GENERAL;
1098                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1099                                         full_fname(dir), strerror(errno));
1100                                 continue;
1101                         }
1102
1103                         if (lastdir && strcmp(lastdir, dir) == 0) {
1104                                 flist_dir = lastdir;
1105                                 flist_dir_len = lastdir_len;
1106                         } else {
1107                                 flist_dir = lastdir = strdup(dir);
1108                                 flist_dir_len = lastdir_len = strlen(dir);
1109                         }
1110                 }
1111
1112                 if (one_file_system)
1113                         set_filesystem(fname);
1114
1115                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1116
1117                 if (olddir[0]) {
1118                         flist_dir = NULL;
1119                         flist_dir_len = 0;
1120                         if (!pop_dir(olddir)) {
1121                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1122                                         full_fname(dir), strerror(errno));
1123                                 exit_cleanup(RERR_FILESELECT);
1124                         }
1125                 }
1126         }
1127
1128         if (f != -1) {
1129                 send_file_entry(NULL, f, 0);
1130
1131                 if (show_filelist_p())
1132                         finish_filelist_progress(flist);
1133         }
1134
1135         clean_flist(flist, 0, 0);
1136
1137         if (f != -1) {
1138                 /* Now send the uid/gid list. This was introduced in
1139                  * protocol version 15 */
1140                 send_uid_list(f);
1141
1142                 /* send the io_error flag */
1143                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1144
1145                 io_end_buffering();
1146                 stats.flist_size = stats.total_written - start_write;
1147                 stats.num_files = flist->count;
1148                 if (write_batch)
1149                         write_batch_flist_info(flist->count, flist->files);
1150         }
1151
1152         if (verbose > 2)
1153                 rprintf(FINFO, "send_file_list done\n");
1154
1155         return flist;
1156 }
1157
1158
1159 struct file_list *recv_file_list(int f)
1160 {
1161         struct file_list *flist;
1162         unsigned short flags;
1163         int64 start_read;
1164         extern int list_only;
1165
1166         if (show_filelist_p())
1167                 start_filelist_progress("receiving file list");
1168
1169         start_read = stats.total_read;
1170
1171         flist = new(struct file_list);
1172         if (!flist)
1173                 goto oom;
1174
1175         flist->count = 0;
1176         flist->malloced = 1000;
1177         flist->files = new_array(struct file_struct *, flist->malloced);
1178         if (!flist->files)
1179                 goto oom;
1180
1181
1182         while ((flags = read_byte(f)) != 0) {
1183                 int i = flist->count;
1184
1185                 flist_expand(flist);
1186
1187                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1188                         flags |= read_byte(f) << 8;
1189                 receive_file_entry(&flist->files[i], flags, f);
1190
1191                 if (S_ISREG(flist->files[i]->mode))
1192                         stats.total_size += flist->files[i]->length;
1193
1194                 flist->count++;
1195
1196                 maybe_emit_filelist_progress(flist);
1197
1198                 if (verbose > 2) {
1199                         rprintf(FINFO, "recv_file_name(%s)\n",
1200                                 f_name(flist->files[i]));
1201                 }
1202         }
1203         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1204
1205         if (verbose > 2)
1206                 rprintf(FINFO, "received %d names\n", flist->count);
1207
1208         if (show_filelist_p())
1209                 finish_filelist_progress(flist);
1210
1211         clean_flist(flist, relative_paths, 1);
1212
1213         if (f != -1) {
1214                 /* Now send the uid/gid list. This was introduced in
1215                  * protocol version 15 */
1216                 recv_uid_list(f, flist);
1217
1218                 if (!read_batch) {
1219                         /* Recv the io_error flag */
1220                         if (lp_ignore_errors(module_id) || ignore_errors)
1221                                 read_int(f);
1222                         else
1223                                 io_error |= read_int(f);
1224                 }
1225         }
1226
1227         if (list_only) {
1228                 int i;
1229                 for (i = 0; i < flist->count; i++)
1230                         list_file_entry(flist->files[i]);
1231         }
1232
1233         if (verbose > 2)
1234                 rprintf(FINFO, "recv_file_list done\n");
1235
1236         stats.flist_size = stats.total_read - start_read;
1237         stats.num_files = flist->count;
1238
1239         return flist;
1240
1241       oom:
1242         out_of_memory("recv_file_list");
1243         return NULL;            /* not reached */
1244 }
1245
1246
1247 int file_compare(struct file_struct **file1, struct file_struct **file2)
1248 {
1249         struct file_struct *f1 = *file1;
1250         struct file_struct *f2 = *file2;
1251
1252         if (!f1->basename && !f2->basename)
1253                 return 0;
1254         if (!f1->basename)
1255                 return -1;
1256         if (!f2->basename)
1257                 return 1;
1258         if (f1->dirname == f2->dirname)
1259                 return u_strcmp(f1->basename, f2->basename);
1260         return f_name_cmp(f1, f2);
1261 }
1262
1263
1264 int flist_find(struct file_list *flist, struct file_struct *f)
1265 {
1266         int low = 0, high = flist->count - 1;
1267
1268         while (high >= 0 && !flist->files[high]->basename) high--;
1269
1270         if (high < 0)
1271                 return -1;
1272
1273         while (low != high) {
1274                 int mid = (low + high) / 2;
1275                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1276                 if (ret == 0)
1277                         return flist_up(flist, mid);
1278                 if (ret > 0)
1279                         high = mid;
1280                 else
1281                         low = mid + 1;
1282         }
1283
1284         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1285                 return flist_up(flist, low);
1286         return -1;
1287 }
1288
1289
1290 /*
1291  * free up one file
1292  */
1293 void free_file(struct file_struct *file)
1294 {
1295         if (!file)
1296                 return;
1297         if (file->basename)
1298                 free(file->basename);
1299         if (!IS_DEVICE(file->mode) && file->u.link)
1300                 free(file->u.link); /* Handles u.sum too. */
1301         if (file->link_u.idev)
1302                 free((char*)file->link_u.idev); /* Handles link_u.links too. */
1303         *file = null_file;
1304 }
1305
1306
1307 /*
1308  * allocate a new file list
1309  */
1310 struct file_list *flist_new(void)
1311 {
1312         struct file_list *flist;
1313
1314         flist = new(struct file_list);
1315         if (!flist)
1316                 out_of_memory("send_file_list");
1317
1318         flist->count = 0;
1319         flist->malloced = 0;
1320         flist->files = NULL;
1321
1322 #if ARENA_SIZE > 0
1323         flist->string_area = string_area_new(0);
1324 #else
1325         flist->string_area = NULL;
1326 #endif
1327         return flist;
1328 }
1329
1330 /*
1331  * free up all elements in a flist
1332  */
1333 void flist_free(struct file_list *flist)
1334 {
1335         int i;
1336         for (i = 1; i < flist->count; i++) {
1337                 if (!flist->string_area)
1338                         free_file(flist->files[i]);
1339                 free(flist->files[i]);
1340         }
1341         /* FIXME: I don't think we generally need to blank the flist
1342          * since it's about to be freed.  This will just cause more
1343          * memory traffic.  If you want a freed-memory debugger, you
1344          * know where to get it. */
1345         memset((char *) flist->files, 0,
1346                sizeof(flist->files[0]) * flist->count);
1347         free(flist->files);
1348         if (flist->string_area)
1349                 string_area_free(flist->string_area);
1350         memset((char *) flist, 0, sizeof(*flist));
1351         free(flist);
1352 }
1353
1354
1355 /*
1356  * This routine ensures we don't have any duplicate names in our file list.
1357  * duplicate names can cause corruption because of the pipelining
1358  */
1359 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1360 {
1361         int i, prev_i = 0;
1362
1363         if (!flist || flist->count == 0)
1364                 return;
1365
1366         qsort(flist->files, flist->count,
1367               sizeof(flist->files[0]), (int (*)()) file_compare);
1368
1369         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1370                 if (flist->files[i]->basename) {
1371                         prev_i = i;
1372                         break;
1373                 }
1374         }
1375         while (++i < flist->count) {
1376                 if (!flist->files[i]->basename)
1377                         continue;
1378                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1379                         if (verbose > 1 && !am_server) {
1380                                 rprintf(FINFO,
1381                                         "removing duplicate name %s from file list %d\n",
1382                                         f_name(flist->files[i]), i);
1383                         }
1384                         /* Make sure that if we unduplicate '.', that we don't
1385                          * lose track of a user-specified starting point (or
1386                          * else deletions will mysteriously fail with -R). */
1387                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1388                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1389                         /* it's not great that the flist knows the semantics of
1390                          * the file memory usage, but i'd rather not add a flag
1391                          * byte to that struct.
1392                          * XXX can i use a bit in the flags field? */
1393                         if (flist->string_area)
1394                                 flist->files[i][0] = null_file;
1395                         else
1396                                 free_file(flist->files[i]);
1397                 } else
1398                         prev_i = i;
1399         }
1400
1401         if (strip_root) {
1402                 /* we need to strip off the root directory in the case
1403                    of relative paths, but this must be done _after_
1404                    the sorting phase */
1405                 for (i = 0; i < flist->count; i++) {
1406                         if (flist->files[i]->dirname &&
1407                             flist->files[i]->dirname[0] == '/') {
1408                                 memmove(&flist->files[i]->dirname[0],
1409                                         &flist->files[i]->dirname[1],
1410                                         strlen(flist->files[i]->dirname));
1411                         }
1412
1413                         if (flist->files[i]->dirname &&
1414                             !flist->files[i]->dirname[0]) {
1415                                 flist->files[i]->dirname = NULL;
1416                         }
1417                 }
1418         }
1419
1420         if (verbose <= 3)
1421                 return;
1422
1423         for (i = 0; i < flist->count; i++) {
1424                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f\n",
1425                         who_am_i(), i,
1426                         NS(flist->files[i]->basedir),
1427                         NS(flist->files[i]->dirname),
1428                         NS(flist->files[i]->basename),
1429                         (int) flist->files[i]->mode,
1430                         (double) flist->files[i]->length);
1431         }
1432 }
1433
1434
1435 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1436
1437 /* Compare the names of two file_struct entities, just like strcmp()
1438  * would do if it were operating on the joined strings.  We assume
1439  * that there are no 0-length strings.
1440  */
1441 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1442 {
1443         int dif;
1444         const uchar *c1, *c2;
1445         enum fnc_state state1, state2;
1446
1447         if (!f1 || !f1->basename) {
1448                 if (!f2 || !f2->basename)
1449                         return 0;
1450                 return -1;
1451         }
1452         if (!f2 || !f2->basename)
1453                 return 1;
1454
1455         if (!(c1 = (uchar*)f1->dirname)) {
1456                 state1 = fnc_BASE;
1457                 c1 = (uchar*)f1->basename;
1458         } else
1459                 state1 = fnc_DIR;
1460         if (!(c2 = (uchar*)f2->dirname)) {
1461                 state2 = fnc_BASE;
1462                 c2 = (uchar*)f2->basename;
1463         } else
1464                 state2 = fnc_DIR;
1465
1466         while (1) {
1467                 if ((dif = (int)*c1 - (int)*c2) != 0)
1468                         break;
1469                 if (!*++c1) {
1470                         switch (state1) {
1471                         case fnc_DIR:
1472                                 state1 = fnc_SLASH;
1473                                 c1 = (uchar*)"/";
1474                                 break;
1475                         case fnc_SLASH:
1476                                 state1 = fnc_BASE;
1477                                 c1 = (uchar*)f1->basename;
1478                                 break;
1479                         case fnc_BASE:
1480                                 break;
1481                         }
1482                 }
1483                 if (!*++c2) {
1484                         switch (state2) {
1485                         case fnc_DIR:
1486                                 state2 = fnc_SLASH;
1487                                 c2 = (uchar*)"/";
1488                                 break;
1489                         case fnc_SLASH:
1490                                 state2 = fnc_BASE;
1491                                 c2 = (uchar*)f2->basename;
1492                                 break;
1493                         case fnc_BASE:
1494                                 if (!*c1)
1495                                         return 0;
1496                                 break;
1497                         }
1498                 }
1499         }
1500
1501         return dif;
1502 }
1503
1504
1505 /* Return a copy of the full filename of a flist entry, using the indicated
1506  * buffer.  No size-checking is done because we checked the size when creating
1507  * the file_struct entry.
1508  */
1509 char *f_name_to(struct file_struct *f, char *fbuf)
1510 {
1511         if (!f || !f->basename)
1512                 return NULL;
1513
1514         if (f->dirname) {
1515                 int len = strlen(f->dirname);
1516                 memcpy(fbuf, f->dirname, len);
1517                 fbuf[len] = '/';
1518                 strcpy(fbuf + len + 1, f->basename);
1519         } else
1520                 strcpy(fbuf, f->basename);
1521         return fbuf;
1522 }
1523
1524
1525 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1526  */
1527 char *f_name(struct file_struct *f)
1528 {
1529         static char names[5][MAXPATHLEN];
1530         static unsigned int n;
1531
1532         n = (n + 1) % (sizeof names / sizeof names[0]);
1533
1534         return f_name_to(f, names[n]);
1535 }