flist.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 /* generate and receive file lists */
  21
  22 #include "rsync.h"
  23
  24 extern struct stats stats;
  25
  26 extern int csum_length;
  27
  28 extern int verbose;
  29 extern int am_server;
  30 extern int always_checksum;
  31
  32 extern int cvs_exclude;
  33
  34 extern int recurse;
  35
  36 extern int one_file_system;
  37 extern int make_backups;
  38 extern int preserve_links;
  39 extern int preserve_hard_links;
  40 extern int preserve_perms;
  41 extern int preserve_devices;
  42 extern int preserve_uid;
  43 extern int preserve_gid;
  44 extern int preserve_times;
  45 extern int relative_paths;
  46 extern int copy_links;
  47 extern int remote_version;
  48 extern int io_error;
  49
  50 static struct exclude_struct **local_exclude_list;
  51
  52 static void clean_flist(struct file_list *flist, int strip_root);
  53
  54 int link_stat(const char *Path, STRUCT_STAT *Buffer)
  55 {
  56 #if SUPPORT_LINKS
  57     if (copy_links) {
  58         return do_stat(Path, Buffer);
  59     } else {
  60         return do_lstat(Path, Buffer);
  61     }
  62 #else
  63     return do_stat(Path, Buffer);
  64 #endif
  65 }
  66
  67 /*
  68   This function is used to check if a file should be included/excluded
  69   from the list of files based on its name and type etc
  70  */
  71 static int match_file_name(char *fname,STRUCT_STAT *st)
  72 {
  73   if (check_exclude(fname,local_exclude_list,st)) {
  74     if (verbose > 2)
  75       rprintf(FINFO,"excluding file %s\n",fname);
  76     return 0;
  77   }
  78   return 1;
  79 }
  80
  81 /* used by the one_file_system code */
  82 static dev_t filesystem_dev;
  83
  84 static void set_filesystem(char *fname)
  85 {
  86   STRUCT_STAT st;
  87   if (link_stat(fname,&st) != 0) return;
  88   filesystem_dev = st.st_dev;
  89 }
  90
  91
  92 static void send_directory(int f,struct file_list *flist,char *dir);
  93
  94 static char *flist_dir;
  95
  96
  97 static void send_file_entry(struct file_struct *file,int f,unsigned base_flags)
  98 {
  99         unsigned char flags;
 100         static time_t last_time;
 101         static mode_t last_mode;
 102         static dev_t last_rdev;
 103         static uid_t last_uid;
 104         static gid_t last_gid;
 105         static char lastname[MAXPATHLEN];
 106         char *fname;
 107         int l1,l2;
 108
 109         if (f == -1) return;
 110
 111         if (!file) {
 112                 write_byte(f,0);
 113                 return;
 114         }
 115
 116         fname = f_name(file);
 117
 118         flags = base_flags;
 119
 120         if (file->mode == last_mode) flags |= SAME_MODE;
 121         if (file->rdev == last_rdev) flags |= SAME_RDEV;
 122         if (file->uid == last_uid) flags |= SAME_UID;
 123         if (file->gid == last_gid) flags |= SAME_GID;
 124         if (file->modtime == last_time) flags |= SAME_TIME;
 125
 126         for (l1=0;lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);l1++) ;
 127         l2 = strlen(fname) - l1;
 128
 129         if (l1 > 0) flags |= SAME_NAME;
 130         if (l2 > 255) flags |= LONG_NAME;
 131
 132         /* we must make sure we don't send a zero flags byte or the other
 133            end will terminate the flist transfer */
 134         if (flags == 0 && !S_ISDIR(file->mode)) flags |= FLAG_DELETE;
 135         if (flags == 0) flags |= LONG_NAME;
 136
 137         write_byte(f,flags);
 138         if (flags & SAME_NAME)
 139                 write_byte(f,l1);
 140         if (flags & LONG_NAME)
 141                 write_int(f,l2);
 142         else
 143                 write_byte(f,l2);
 144         write_buf(f,fname+l1,l2);
 145
 146         write_longint(f,file->length);
 147         if (!(flags & SAME_TIME))
 148                 write_int(f,(int)file->modtime);
 149         if (!(flags & SAME_MODE))
 150                 write_int(f,(int)file->mode);
 151         if (preserve_uid && !(flags & SAME_UID)) {
 152                 add_uid(file->uid);
 153                 write_int(f,(int)file->uid);
 154         }
 155         if (preserve_gid && !(flags & SAME_GID)) {
 156                 add_gid(file->gid);
 157                 write_int(f,(int)file->gid);
 158         }
 159         if (preserve_devices && IS_DEVICE(file->mode) && !(flags & SAME_RDEV))
 160                 write_int(f,(int)file->rdev);
 161
 162 #if SUPPORT_LINKS
 163         if (preserve_links && S_ISLNK(file->mode)) {
 164                 write_int(f,strlen(file->link));
 165                 write_buf(f,file->link,strlen(file->link));
 166         }
 167 #endif
 168
 169 #if SUPPORT_HARD_LINKS
 170         if (preserve_hard_links && S_ISREG(file->mode)) {
 171                 write_int(f,(int)file->dev);
 172                 write_int(f,(int)file->inode);
 173         }
 174 #endif
 175
 176         if (always_checksum) {
 177                 write_buf(f,file->sum,csum_length);
 178         }
 179
 180         last_mode = file->mode;
 181         last_rdev = file->rdev;
 182         last_uid = file->uid;
 183         last_gid = file->gid;
 184         last_time = file->modtime;
 185
 186         strlcpy(lastname,fname,MAXPATHLEN-1);
 187         lastname[MAXPATHLEN-1] = 0;
 188 }
 189
 190
 191
 192 static void receive_file_entry(struct file_struct **fptr,
 193                                unsigned flags,int f)
 194 {
 195         static time_t last_time;
 196         static mode_t last_mode;
 197         static dev_t last_rdev;
 198         static uid_t last_uid;
 199         static gid_t last_gid;
 200         static char lastname[MAXPATHLEN];
 201         char thisname[MAXPATHLEN];
 202         int l1=0,l2=0;
 203         char *p;
 204         struct file_struct *file;
 205
 206         if (flags & SAME_NAME)
 207                 l1 = read_byte(f);
 208
 209         if (flags & LONG_NAME)
 210                 l2 = read_int(f);
 211         else
 212                 l2 = read_byte(f);
 213
 214         file = (struct file_struct *)malloc(sizeof(*file));
 215         if (!file) out_of_memory("receive_file_entry");
 216         memset((char *)file, 0, sizeof(*file));
 217         (*fptr) = file;
 218
 219         if (l2 >= MAXPATHLEN-l1) overflow("receive_file_entry");
 220
 221         strlcpy(thisname,lastname,l1);
 222         read_sbuf(f,&thisname[l1],l2);
 223         thisname[l1+l2] = 0;
 224
 225         strlcpy(lastname,thisname,MAXPATHLEN-1);
 226         lastname[MAXPATHLEN-1] = 0;
 227
 228         clean_fname(thisname);
 229
 230         if ((p = strrchr(thisname,'/'))) {
 231                 static char *lastdir;
 232                 *p = 0;
 233                 if (lastdir && strcmp(thisname, lastdir)==0) {
 234                         file->dirname = lastdir;
 235                 } else {
 236                         file->dirname = strdup(thisname);
 237                         lastdir = file->dirname;
 238                 }
 239                 file->basename = strdup(p+1);
 240         } else {
 241                 file->dirname = NULL;
 242                 file->basename = strdup(thisname);
 243         }
 244
 245         if (!file->basename) out_of_memory("receive_file_entry 1");
 246
 247
 248         file->flags = flags;
 249         file->length = read_longint(f);
 250         file->modtime = (flags & SAME_TIME) ? last_time : (time_t)read_int(f);
 251         file->mode = (flags & SAME_MODE) ? last_mode : (mode_t)read_int(f);
 252         if (preserve_uid)
 253                 file->uid = (flags & SAME_UID) ? last_uid : (uid_t)read_int(f);
 254         if (preserve_gid)
 255                 file->gid = (flags & SAME_GID) ? last_gid : (gid_t)read_int(f);
 256         if (preserve_devices && IS_DEVICE(file->mode))
 257                 file->rdev = (flags & SAME_RDEV) ? last_rdev : (dev_t)read_int(f);
 258
 259         if (preserve_links && S_ISLNK(file->mode)) {
 260                 int l = read_int(f);
 261                 file->link = (char *)malloc(l+1);
 262                 if (!file->link) out_of_memory("receive_file_entry 2");
 263                 read_sbuf(f,file->link,l);
 264         }
 265
 266 #if SUPPORT_HARD_LINKS
 267         if (preserve_hard_links && S_ISREG(file->mode)) {
 268                 file->dev = read_int(f);
 269                 file->inode = read_int(f);
 270         }
 271 #endif
 272
 273         if (always_checksum) {
 274                 file->sum = (char *)malloc(MD4_SUM_LENGTH);
 275                 if (!file->sum) out_of_memory("md4 sum");
 276                 read_buf(f,file->sum,csum_length);
 277         }
 278
 279         last_mode = file->mode;
 280         last_rdev = file->rdev;
 281         last_uid = file->uid;
 282         last_gid = file->gid;
 283         last_time = file->modtime;
 284
 285         if (!preserve_perms) {
 286                 extern int orig_umask;
 287                 /* set an appropriate set of permissions based on original
 288                    permissions and umask. This emulates what GNU cp does */
 289                 file->mode &= ~orig_umask;
 290         }
 291 }
 292
 293
 294 /* determine if a file in a different filesstem should be skipped
 295    when one_file_system is set. We bascally only want to include
 296    the mount points - but they can be hard to find! */
 297 static int skip_filesystem(char *fname, STRUCT_STAT *st)
 298 {
 299         STRUCT_STAT st2;
 300         char *p = strrchr(fname, '/');
 301
 302         /* skip all but directories */
 303         if (!S_ISDIR(st->st_mode)) return 1;
 304
 305         /* if its not a subdirectory then allow */
 306         if (!p) return 0;
 307
 308         *p = 0;
 309         if (link_stat(fname, &st2)) {
 310                 *p = '/';
 311                 return 0;
 312         }
 313         *p = '/';
 314
 315         return (st2.st_dev != filesystem_dev);
 316 }
 317
 318 static struct file_struct *make_file(char *fname)
 319 {
 320         struct file_struct *file;
 321         STRUCT_STAT st;
 322         char sum[SUM_LENGTH];
 323         char *p;
 324         char cleaned_name[MAXPATHLEN];
 325
 326         strlcpy(cleaned_name, fname, MAXPATHLEN-1);
 327         cleaned_name[MAXPATHLEN-1] = 0;
 328         clean_fname(cleaned_name);
 329         fname = cleaned_name;
 330
 331         memset(sum,0,SUM_LENGTH);
 332
 333         if (link_stat(fname,&st) != 0) {
 334                 io_error = 1;
 335                 rprintf(FERROR,"%s: %s\n",
 336                         fname,strerror(errno));
 337                 return NULL;
 338         }
 339
 340         if (S_ISDIR(st.st_mode) && !recurse) {
 341                 rprintf(FINFO,"skipping directory %s\n",fname);
 342                 return NULL;
 343         }
 344
 345         if (one_file_system && st.st_dev != filesystem_dev) {
 346                 if (skip_filesystem(fname, &st))
 347                         return NULL;
 348         }
 349
 350         if (!match_file_name(fname,&st))
 351                 return NULL;
 352
 353         if (verbose > 2)
 354                 rprintf(FINFO,"make_file(%s)\n",fname);
 355
 356         file = (struct file_struct *)malloc(sizeof(*file));
 357         if (!file) out_of_memory("make_file");
 358         memset((char *)file,0,sizeof(*file));
 359
 360         if ((p = strrchr(fname,'/'))) {
 361                 static char *lastdir;
 362                 *p = 0;
 363                 if (lastdir && strcmp(fname, lastdir)==0) {
 364                         file->dirname = lastdir;
 365                 } else {
 366                         file->dirname = strdup(fname);
 367                         lastdir = file->dirname;
 368                 }
 369                 file->basename = strdup(p+1);
 370                 *p = '/';
 371         } else {
 372                 file->dirname = NULL;
 373                 file->basename = strdup(fname);
 374         }
 375
 376         file->modtime = st.st_mtime;
 377         file->length = st.st_size;
 378         file->mode = st.st_mode;
 379         file->uid = st.st_uid;
 380         file->gid = st.st_gid;
 381         file->dev = st.st_dev;
 382         file->inode = st.st_ino;
 383 #ifdef HAVE_ST_RDEV
 384         file->rdev = st.st_rdev;
 385 #endif
 386
 387 #if SUPPORT_LINKS
 388         if (S_ISLNK(st.st_mode)) {
 389                 int l;
 390                 char lnk[MAXPATHLEN];
 391                 if ((l=readlink(fname,lnk,MAXPATHLEN-1)) == -1) {
 392                         io_error=1;
 393                         rprintf(FERROR,"readlink %s : %s\n",
 394                                 fname,strerror(errno));
 395                         return NULL;
 396                 }
 397                 lnk[l] = 0;
 398                 file->link = strdup(lnk);
 399         }
 400 #endif
 401
 402         if (always_checksum) {
 403                 file->sum = (char *)malloc(MD4_SUM_LENGTH);
 404                 if (!file->sum) out_of_memory("md4 sum");
 405                 /* drat. we have to provide a null checksum for non-regular
 406                    files in order to be compatible with earlier versions
 407                    of rsync */
 408                 if (S_ISREG(st.st_mode)) {
 409                         file_checksum(fname,file->sum,st.st_size);
 410                 } else {
 411                         memset(file->sum, 0, MD4_SUM_LENGTH);
 412                 }
 413         }
 414
 415         if (flist_dir) {
 416                 static char *lastdir;
 417                 if (lastdir && strcmp(lastdir, flist_dir)==0) {
 418                         file->basedir = lastdir;
 419                 } else {
 420                         file->basedir = strdup(flist_dir);
 421                         lastdir = file->basedir;
 422                 }
 423         } else {
 424                 file->basedir = NULL;
 425         }
 426
 427         if (!S_ISDIR(st.st_mode))
 428                 stats.total_size += st.st_size;
 429
 430         return file;
 431 }
 432
 433
 434
 435 void send_file_name(int f,struct file_list *flist,char *fname,
 436                            int recursive, unsigned base_flags)
 437 {
 438   struct file_struct *file;
 439
 440   file = make_file(fname);
 441
 442   if (!file) return;
 443
 444   if (flist->count >= flist->malloced) {
 445           if (flist->malloced < 1000)
 446                   flist->malloced += 1000;
 447           else
 448                   flist->malloced *= 2;
 449           flist->files = (struct file_struct **)realloc(flist->files,
 450                                                         sizeof(flist->files[0])*
 451                                                         flist->malloced);
 452           if (!flist->files)
 453                   out_of_memory("send_file_name");
 454   }
 455
 456   if (strcmp(file->basename,"")) {
 457     flist->files[flist->count++] = file;
 458     send_file_entry(file,f,base_flags);
 459   }
 460
 461   if (S_ISDIR(file->mode) && recursive) {
 462           struct exclude_struct **last_exclude_list = local_exclude_list;
 463           send_directory(f,flist,f_name(file));
 464           local_exclude_list = last_exclude_list;
 465           return;
 466   }
 467 }
 468
 469
 470
 471 static void send_directory(int f,struct file_list *flist,char *dir)
 472 {
 473         DIR *d;
 474         struct dirent *di;
 475         char fname[MAXPATHLEN];
 476         int l;
 477         char *p;
 478
 479         d = opendir(dir);
 480         if (!d) {
 481                 io_error = 1;
 482                 rprintf(FERROR,"opendir(%s): %s\n",
 483                         dir,strerror(errno));
 484                 return;
 485         }
 486
 487         strlcpy(fname,dir,MAXPATHLEN-1);
 488         l = strlen(fname);
 489         if (fname[l-1] != '/') {
 490                 if (l == MAXPATHLEN-1) {
 491                         io_error = 1;
 492                         rprintf(FERROR,"skipping long-named directory %s\n",fname);
 493                         closedir(d);
 494                         return;
 495                 }
 496                 strlcat(fname,"/", MAXPATHLEN-1);
 497                 l++;
 498         }
 499         p = fname + strlen(fname);
 500
 501         local_exclude_list = NULL;
 502
 503         if (cvs_exclude) {
 504                 if (strlen(fname) + strlen(".cvsignore") <= MAXPATHLEN-1) {
 505                         strcpy(p,".cvsignore");
 506                         local_exclude_list = make_exclude_list(fname,NULL,0,0);
 507                 } else {
 508                         io_error = 1;
 509                         rprintf(FINFO,"cannot cvs-exclude in long-named directory %s\n",fname);
 510                 }
 511         }
 512
 513         for (di=readdir(d); di; di=readdir(d)) {
 514                 char *dname = d_name(di);
 515                 if (strcmp(dname,".")==0 ||
 516                     strcmp(dname,"..")==0)
 517                         continue;
 518                 strlcpy(p,dname,MAXPATHLEN-(l+1));
 519                 send_file_name(f,flist,fname,recurse,0);
 520         }
 521
 522         if (local_exclude_list) {
 523                 add_exclude_list("!", &local_exclude_list, 0);
 524         }
 525
 526         closedir(d);
 527 }
 528
 529
 530
 531 struct file_list *send_file_list(int f,int argc,char *argv[])
 532 {
 533         int i,l;
 534         STRUCT_STAT st;
 535         char *p,*dir,*olddir;
 536         char lastpath[MAXPATHLEN]="";
 537         struct file_list *flist;
 538         int64 start_write;
 539
 540         if (verbose && recurse && !am_server && f != -1) {
 541                 rprintf(FINFO,"building file list ... ");
 542                 rflush(FINFO);
 543         }
 544
 545         start_write = stats.total_written;
 546
 547         flist = (struct file_list *)malloc(sizeof(flist[0]));
 548         if (!flist) out_of_memory("send_file_list");
 549
 550         flist->count=0;
 551         flist->malloced = 1000;
 552         flist->files = (struct file_struct **)malloc(sizeof(flist->files[0])*
 553                                                      flist->malloced);
 554         if (!flist->files) out_of_memory("send_file_list");
 555
 556         if (f != -1) {
 557                 io_start_buffering(f);
 558         }
 559
 560         for (i=0;i<argc;i++) {
 561                 char fname2[MAXPATHLEN];
 562                 char *fname = fname2;
 563
 564                 strlcpy(fname,argv[i],MAXPATHLEN-1);
 565
 566                 l = strlen(fname);
 567                 if (l != 1 && fname[l-1] == '/') {
 568                         strlcat(fname,".",MAXPATHLEN-1);
 569                 }
 570
 571                 if (link_stat(fname,&st) != 0) {
 572                         io_error=1;
 573                         rprintf(FERROR,"%s : %s\n",fname,strerror(errno));
 574                         continue;
 575                 }
 576
 577                 if (S_ISDIR(st.st_mode) && !recurse) {
 578                         rprintf(FINFO,"skipping directory %s\n",fname);
 579                         continue;
 580                 }
 581
 582                 dir = NULL;
 583                 olddir = NULL;
 584
 585                 if (!relative_paths) {
 586                         p = strrchr(fname,'/');
 587                         if (p) {
 588                                 *p = 0;
 589                                 if (p == fname)
 590                                         dir = "/";
 591                                 else
 592                                         dir = fname;
 593                                 fname = p+1;
 594                         }
 595                 } else if (f != -1 && (p=strrchr(fname,'/'))) {
 596                         /* this ensures we send the intermediate directories,
 597                            thus getting their permissions right */
 598                         *p = 0;
 599                         if (strcmp(lastpath,fname)) {
 600                                 strlcpy(lastpath, fname, sizeof(lastpath)-1);
 601                                 *p = '/';
 602                                 for (p=fname+1; (p=strchr(p,'/')); p++) {
 603                                         int copy_links_saved = copy_links;
 604                                         *p = 0;
 605                                         copy_links = 0;
 606                                         send_file_name(f, flist, fname, 0, 0);
 607                                         copy_links = copy_links_saved;
 608                                         *p = '/';
 609                                 }
 610                         } else {
 611                                 *p = '/';
 612                         }
 613                 }
 614
 615                 if (!*fname)
 616                         fname = ".";
 617
 618                 if (dir && *dir) {
 619                         olddir = push_dir(dir, 1);
 620
 621                         if (!olddir) {
 622                                 io_error=1;
 623                                 rprintf(FERROR,"push_dir %s : %s\n",
 624                                         dir,strerror(errno));
 625                                 continue;
 626                         }
 627
 628                         flist_dir = dir;
 629                 }
 630
 631                 if (one_file_system)
 632                         set_filesystem(fname);
 633
 634                 if (!recurse || !send_included_file_names(f,flist))
 635                         send_file_name(f,flist,fname,recurse,FLAG_DELETE);
 636
 637                 if (olddir != NULL) {
 638                         flist_dir = NULL;
 639                         if (pop_dir(olddir) != 0) {
 640                                 rprintf(FERROR,"pop_dir %s : %s\n",
 641                                         dir,strerror(errno));
 642                                 exit_cleanup(1);
 643                         }
 644                 }
 645         }
 646
 647         if (f != -1) {
 648                 send_file_entry(NULL,f,0);
 649         }
 650
 651         if (verbose && recurse && !am_server && f != -1)
 652                 rprintf(FINFO,"done\n");
 653
 654         clean_flist(flist, 0);
 655
 656         /* now send the uid/gid list. This was introduced in protocol
 657            version 15 */
 658         if (f != -1 && remote_version >= 15) {
 659                 send_uid_list(f);
 660         }
 661
 662         /* if protocol version is >= 17 then send the io_error flag */
 663         if (f != -1 && remote_version >= 17) {
 664                 write_int(f, io_error);
 665         }
 666
 667         if (f != -1) {
 668                 io_end_buffering(f);
 669                 stats.flist_size = stats.total_written - start_write;
 670                 stats.num_files = flist->count;
 671         }
 672
 673         if (verbose > 2)
 674                 rprintf(FINFO,"send_file_list done\n");
 675
 676         return flist;
 677 }
 678
 679
 680 struct file_list *recv_file_list(int f)
 681 {
 682   struct file_list *flist;
 683   unsigned char flags;
 684   int64 start_read;
 685
 686   if (verbose && recurse && !am_server) {
 687     rprintf(FINFO,"receiving file list ... ");
 688     rflush(FINFO);
 689   }
 690
 691   start_read = stats.total_read;
 692
 693   flist = (struct file_list *)malloc(sizeof(flist[0]));
 694   if (!flist)
 695     goto oom;
 696
 697   flist->count=0;
 698   flist->malloced=1000;
 699   flist->files = (struct file_struct **)malloc(sizeof(flist->files[0])*
 700                                                flist->malloced);
 701   if (!flist->files)
 702     goto oom;
 703
 704
 705   for (flags=read_byte(f); flags; flags=read_byte(f)) {
 706     int i = flist->count;
 707
 708     if (i >= flist->malloced) {
 709           if (flist->malloced < 1000)
 710                   flist->malloced += 1000;
 711           else
 712                   flist->malloced *= 2;
 713           flist->files =(struct file_struct **)realloc(flist->files,
 714                                                        sizeof(flist->files[0])*
 715                                                        flist->malloced);
 716           if (!flist->files)
 717                   goto oom;
 718     }
 719
 720     receive_file_entry(&flist->files[i],flags,f);
 721
 722     if (S_ISREG(flist->files[i]->mode))
 723             stats.total_size += flist->files[i]->length;
 724
 725     flist->count++;
 726
 727     if (verbose > 2)
 728       rprintf(FINFO,"recv_file_name(%s)\n",f_name(flist->files[i]));
 729   }
 730
 731
 732   if (verbose > 2)
 733     rprintf(FINFO,"received %d names\n",flist->count);
 734
 735   clean_flist(flist, relative_paths);
 736
 737   if (verbose && recurse && !am_server) {
 738     rprintf(FINFO,"done\n");
 739   }
 740
 741   /* now recv the uid/gid list. This was introduced in protocol version 15 */
 742   if (f != -1 && remote_version >= 15) {
 743           recv_uid_list(f, flist);
 744   }
 745
 746   /* if protocol version is >= 17 then recv the io_error flag */
 747   if (f != -1 && remote_version >= 17) {
 748           io_error |= read_int(f);
 749   }
 750
 751   if (verbose > 2)
 752     rprintf(FINFO,"recv_file_list done\n");
 753
 754   stats.flist_size = stats.total_read - start_read;
 755   stats.num_files = flist->count;
 756
 757   return flist;
 758
 759 oom:
 760     out_of_memory("recv_file_list");
 761     return NULL; /* not reached */
 762 }
 763
 764
 765 int file_compare(struct file_struct **f1,struct file_struct **f2)
 766 {
 767         if (!(*f1)->basename && !(*f2)->basename) return 0;
 768         if (!(*f1)->basename) return -1;
 769         if (!(*f2)->basename) return 1;
 770         if ((*f1)->dirname == (*f2)->dirname)
 771                 return u_strcmp((*f1)->basename, (*f2)->basename);
 772         return u_strcmp(f_name(*f1),f_name(*f2));
 773 }
 774
 775
 776 int flist_find(struct file_list *flist,struct file_struct *f)
 777 {
 778         int low=0,high=flist->count-1;
 779
 780         if (flist->count <= 0) return -1;
 781
 782         while (low != high) {
 783                 int mid = (low+high)/2;
 784                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
 785                 if (ret == 0) return flist_up(flist, mid);
 786                 if (ret > 0) {
 787                         high=mid;
 788                 } else {
 789                         low=mid+1;
 790                 }
 791         }
 792
 793         if (file_compare(&flist->files[flist_up(flist,low)],&f) == 0)
 794                 return flist_up(flist,low);
 795         return -1;
 796 }
 797
 798
 799 /*
 800  * free up one file
 801  */
 802 static void free_file(struct file_struct *file)
 803 {
 804         if (!file) return;
 805         if (file->basename) free(file->basename);
 806         if (file->link) free(file->link);
 807         if (file->sum) free(file->sum);
 808         memset((char *)file, 0, sizeof(*file));
 809 }
 810
 811
 812 /*
 813  * free up all elements in a flist
 814  */
 815 void flist_free(struct file_list *flist)
 816 {
 817         int i;
 818         for (i=1;i<flist->count;i++) {
 819                 free_file(flist->files[i]);
 820                 free(flist->files[i]);
 821         }
 822         memset((char *)flist->files, 0, sizeof(flist->files[0])*flist->count);
 823         free(flist->files);
 824         memset((char *)flist, 0, sizeof(*flist));
 825         free(flist);
 826 }
 827
 828
 829 /*
 830  * This routine ensures we don't have any duplicate names in our file list.
 831  * duplicate names can cause corruption because of the pipelining
 832  */
 833 static void clean_flist(struct file_list *flist, int strip_root)
 834 {
 835         int i;
 836
 837         if (!flist || flist->count == 0)
 838                 return;
 839
 840         qsort(flist->files,flist->count,
 841               sizeof(flist->files[0]),
 842               (int (*)())file_compare);
 843
 844         for (i=1;i<flist->count;i++) {
 845                 if (flist->files[i]->basename &&
 846                     flist->files[i-1]->basename &&
 847                     strcmp(f_name(flist->files[i]),
 848                            f_name(flist->files[i-1])) == 0) {
 849                         if (verbose > 1 && !am_server)
 850                                 rprintf(FINFO,"removing duplicate name %s from file list %d\n",
 851                                         f_name(flist->files[i-1]),i-1);
 852                         free_file(flist->files[i]);
 853                 }
 854         }
 855
 856         if (strip_root) {
 857                 /* we need to strip off the root directory in the case
 858                    of relative paths, but this must be done _after_
 859                    the sorting phase */
 860                 for (i=0;i<flist->count;i++) {
 861                         if (flist->files[i]->dirname &&
 862                             flist->files[i]->dirname[0] == '/') {
 863                                 memmove(&flist->files[i]->dirname[0],
 864                                         &flist->files[i]->dirname[1],
 865                                         strlen(flist->files[i]->dirname));
 866                         }
 867
 868                         if (flist->files[i]->dirname &&
 869                             !flist->files[i]->dirname[0]) {
 870                                 flist->files[i]->dirname = NULL;
 871                         }
 872                 }
 873         }
 874
 875
 876         if (verbose <= 3) return;
 877
 878         for (i=0;i<flist->count;i++) {
 879                 rprintf(FINFO,"[%d] i=%d %s %s mode=0%o len=%d\n",
 880                         getpid(), i,
 881                         flist->files[i]->dirname,
 882                         flist->files[i]->basename,
 883                         flist->files[i]->mode,
 884                         flist->files[i]->length);
 885         }
 886 }
 887
 888
 889 /*
 890  * return the full filename of a flist entry
 891  */
 892 char *f_name(struct file_struct *f)
 893 {
 894         static char names[10][MAXPATHLEN];
 895         static int n;
 896         char *p = names[n];
 897
 898         if (!f || !f->basename) return NULL;
 899
 900         n = (n+1)%10;
 901
 902         if (f->dirname) {
 903                 slprintf(p, MAXPATHLEN-1, "%s/%s", f->dirname, f->basename);
 904         } else {
 905                 strlcpy(p, f->basename, MAXPATHLEN-1);
 906         }
 907
 908         return p;
 909 }
 910