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 copy_unsafe_links;
  48 extern int remote_version;
  49 extern int io_error;
  50
  51 static char topsrcname[MAXPATHLEN];
  52
  53 static struct exclude_struct **local_exclude_list;
  54
  55 static void clean_flist(struct file_list *flist, int strip_root);
  56
  57
  58 static void list_file_entry(struct file_struct *f)
  59 {
  60         char perms[11] = "----------";
  61         char *perm_map = "rwxrwxrwx";
  62         int i;
  63
  64         if (!f->basename)
  65                 /* this can happen if duplicate names were removed */
  66                 return;
  67
  68         for (i=0;i<9;i++) {
  69                 if (f->mode & (1<<i)) perms[9-i] = perm_map[8-i];
  70         }
  71         if (S_ISLNK(f->mode)) perms[0] = 'l';
  72         if (S_ISDIR(f->mode)) perms[0] = 'd';
  73         if (S_ISBLK(f->mode)) perms[0] = 'b';
  74         if (S_ISCHR(f->mode)) perms[0] = 'c';
  75         if (S_ISSOCK(f->mode)) perms[0] = 's';
  76         if (S_ISFIFO(f->mode)) perms[0] = 'p';
  77
  78         if (preserve_links && S_ISLNK(f->mode)) {
  79                 rprintf(FINFO,"%s %11.0f %s %s -> %s\n",
  80                         perms,
  81                         (double)f->length, timestring(f->modtime),
  82                         f_name(f), f->link);
  83         } else {
  84                 rprintf(FINFO,"%s %11.0f %s %s\n",
  85                         perms,
  86                         (double)f->length, timestring(f->modtime), f_name(f));
  87         }
  88 }
  89
  90
  91 int readlink_stat(const char *Path, STRUCT_STAT *Buffer, char *Linkbuf)
  92 {
  93 #if SUPPORT_LINKS
  94         if (copy_links) {
  95                 return do_stat(Path, Buffer);
  96         }
  97         if (do_lstat(Path, Buffer) == -1) {
  98                 return -1;
  99         }
 100         if (S_ISLNK(Buffer->st_mode)) {
 101                 int l;
 102                 if ((l = readlink(Path,Linkbuf,MAXPATHLEN-1)) == -1) {
 103                         return -1;
 104                 }
 105                 Linkbuf[l] = 0;
 106                 if (copy_unsafe_links && (topsrcname[0] != '\0') &&
 107                                     unsafe_symlink(Linkbuf, topsrcname)) {
 108                         return do_stat(Path, Buffer);
 109                 }
 110         }
 111         return 0;
 112 #else
 113         return do_stat(Path, Buffer);
 114 #endif
 115 }
 116
 117 int link_stat(const char *Path, STRUCT_STAT *Buffer)
 118 {
 119 #if SUPPORT_LINKS
 120     if (copy_links) {
 121         return do_stat(Path, Buffer);
 122     } else {
 123         return do_lstat(Path, Buffer);
 124     }
 125 #else
 126     return do_stat(Path, Buffer);
 127 #endif
 128 }
 129
 130 /*
 131   This function is used to check if a file should be included/excluded
 132   from the list of files based on its name and type etc
 133  */
 134 static int match_file_name(char *fname,STRUCT_STAT *st)
 135 {
 136   if (check_exclude(fname,local_exclude_list,st)) {
 137     if (verbose > 2)
 138       rprintf(FINFO,"excluding file %s\n",fname);
 139     return 0;
 140   }
 141   return 1;
 142 }
 143
 144 /* used by the one_file_system code */
 145 static dev_t filesystem_dev;
 146
 147 static void set_filesystem(char *fname)
 148 {
 149   STRUCT_STAT st;
 150   if (link_stat(fname,&st) != 0) return;
 151   filesystem_dev = st.st_dev;
 152 }
 153
 154
 155 static int to_wire_mode(mode_t mode)
 156 {
 157         if (S_ISLNK(mode) && (S_IFLNK != 0120000)) {
 158                 return (mode & ~(_S_IFMT)) | 0120000;
 159         }
 160         return (int)mode;
 161 }
 162
 163 static mode_t from_wire_mode(int mode)
 164 {
 165         if ((mode & (_S_IFMT)) == 0120000 && (S_IFLNK != 0120000)) {
 166                 return (mode & ~(_S_IFMT)) | S_IFLNK;
 167         }
 168         return (mode_t)mode;
 169 }
 170
 171
 172 static void send_directory(int f,struct file_list *flist,char *dir);
 173
 174 static char *flist_dir;
 175
 176
 177 static void send_file_entry(struct file_struct *file,int f,unsigned base_flags)
 178 {
 179         unsigned char flags;
 180         static time_t last_time;
 181         static mode_t last_mode;
 182         static dev_t last_rdev;
 183         static uid_t last_uid;
 184         static gid_t last_gid;
 185         static char lastname[MAXPATHLEN];
 186         char *fname;
 187         int l1,l2;
 188
 189         if (f == -1) return;
 190
 191         if (!file) {
 192                 write_byte(f,0);
 193                 return;
 194         }
 195
 196         fname = f_name(file);
 197
 198         flags = base_flags;
 199
 200         if (file->mode == last_mode) flags |= SAME_MODE;
 201         if (file->rdev == last_rdev) flags |= SAME_RDEV;
 202         if (file->uid == last_uid) flags |= SAME_UID;
 203         if (file->gid == last_gid) flags |= SAME_GID;
 204         if (file->modtime == last_time) flags |= SAME_TIME;
 205
 206         for (l1=0;lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);l1++) ;
 207         l2 = strlen(fname) - l1;
 208
 209         if (l1 > 0) flags |= SAME_NAME;
 210         if (l2 > 255) flags |= LONG_NAME;
 211
 212         /* we must make sure we don't send a zero flags byte or the other
 213            end will terminate the flist transfer */
 214         if (flags == 0 && !S_ISDIR(file->mode)) flags |= FLAG_DELETE;
 215         if (flags == 0) flags |= LONG_NAME;
 216
 217         write_byte(f,flags);
 218         if (flags & SAME_NAME)
 219                 write_byte(f,l1);
 220         if (flags & LONG_NAME)
 221                 write_int(f,l2);
 222         else
 223                 write_byte(f,l2);
 224         write_buf(f,fname+l1,l2);
 225
 226         write_longint(f,file->length);
 227         if (!(flags & SAME_TIME))
 228                 write_int(f,(int)file->modtime);
 229         if (!(flags & SAME_MODE))
 230                 write_int(f,to_wire_mode(file->mode));
 231         if (preserve_uid && !(flags & SAME_UID)) {
 232                 add_uid(file->uid);
 233                 write_int(f,(int)file->uid);
 234         }
 235         if (preserve_gid && !(flags & SAME_GID)) {
 236                 add_gid(file->gid);
 237                 write_int(f,(int)file->gid);
 238         }
 239         if (preserve_devices && IS_DEVICE(file->mode) && !(flags & SAME_RDEV))
 240                 write_int(f,(int)file->rdev);
 241
 242 #if SUPPORT_LINKS
 243         if (preserve_links && S_ISLNK(file->mode)) {
 244                 write_int(f,strlen(file->link));
 245                 write_buf(f,file->link,strlen(file->link));
 246         }
 247 #endif
 248
 249 #if SUPPORT_HARD_LINKS
 250         if (preserve_hard_links && S_ISREG(file->mode)) {
 251                 write_int(f,(int)file->dev);
 252                 write_int(f,(int)file->inode);
 253         }
 254 #endif
 255
 256         if (always_checksum) {
 257                 write_buf(f,file->sum,csum_length);
 258         }
 259
 260         last_mode = file->mode;
 261         last_rdev = file->rdev;
 262         last_uid = file->uid;
 263         last_gid = file->gid;
 264         last_time = file->modtime;
 265
 266         strlcpy(lastname,fname,MAXPATHLEN);
 267         lastname[MAXPATHLEN-1] = 0;
 268 }
 269
 270
 271
 272 static void receive_file_entry(struct file_struct **fptr,
 273                                unsigned flags,int f)
 274 {
 275         static time_t last_time;
 276         static mode_t last_mode;
 277         static dev_t last_rdev;
 278         static uid_t last_uid;
 279         static gid_t last_gid;
 280         static char lastname[MAXPATHLEN];
 281         char thisname[MAXPATHLEN];
 282         int l1=0,l2=0;
 283         char *p;
 284         struct file_struct *file;
 285
 286         if (flags & SAME_NAME)
 287                 l1 = read_byte(f);
 288
 289         if (flags & LONG_NAME)
 290                 l2 = read_int(f);
 291         else
 292                 l2 = read_byte(f);
 293
 294         file = (struct file_struct *)malloc(sizeof(*file));
 295         if (!file) out_of_memory("receive_file_entry");
 296         memset((char *)file, 0, sizeof(*file));
 297         (*fptr) = file;
 298
 299         if (l2 >= MAXPATHLEN-l1) overflow("receive_file_entry");
 300
 301         strlcpy(thisname,lastname,l1+1);
 302         read_sbuf(f,&thisname[l1],l2);
 303         thisname[l1+l2] = 0;
 304
 305         strlcpy(lastname,thisname,MAXPATHLEN);
 306         lastname[MAXPATHLEN-1] = 0;
 307
 308         clean_fname(thisname);
 309
 310         if ((p = strrchr(thisname,'/'))) {
 311                 static char *lastdir;
 312                 *p = 0;
 313                 if (lastdir && strcmp(thisname, lastdir)==0) {
 314                         file->dirname = lastdir;
 315                 } else {
 316                         file->dirname = strdup(thisname);
 317                         lastdir = file->dirname;
 318                 }
 319                 file->basename = strdup(p+1);
 320         } else {
 321                 file->dirname = NULL;
 322                 file->basename = strdup(thisname);
 323         }
 324
 325         if (!file->basename) out_of_memory("receive_file_entry 1");
 326
 327
 328         file->flags = flags;
 329         file->length = read_longint(f);
 330         file->modtime = (flags & SAME_TIME) ? last_time : (time_t)read_int(f);
 331         file->mode = (flags & SAME_MODE) ? last_mode : from_wire_mode(read_int(f));
 332         if (preserve_uid)
 333                 file->uid = (flags & SAME_UID) ? last_uid : (uid_t)read_int(f);
 334         if (preserve_gid)
 335                 file->gid = (flags & SAME_GID) ? last_gid : (gid_t)read_int(f);
 336         if (preserve_devices && IS_DEVICE(file->mode))
 337                 file->rdev = (flags & SAME_RDEV) ? last_rdev : (dev_t)read_int(f);
 338
 339         if (preserve_links && S_ISLNK(file->mode)) {
 340                 int l = read_int(f);
 341                 file->link = (char *)malloc(l+1);
 342                 if (!file->link) out_of_memory("receive_file_entry 2");
 343                 read_sbuf(f,file->link,l);
 344         }
 345
 346 #if SUPPORT_HARD_LINKS
 347         if (preserve_hard_links && S_ISREG(file->mode)) {
 348                 file->dev = read_int(f);
 349                 file->inode = read_int(f);
 350         }
 351 #endif
 352
 353         if (always_checksum) {
 354                 file->sum = (char *)malloc(MD4_SUM_LENGTH);
 355                 if (!file->sum) out_of_memory("md4 sum");
 356                 read_buf(f,file->sum,csum_length);
 357         }
 358
 359         last_mode = file->mode;
 360         last_rdev = file->rdev;
 361         last_uid = file->uid;
 362         last_gid = file->gid;
 363         last_time = file->modtime;
 364
 365         if (!preserve_perms) {
 366                 extern int orig_umask;
 367                 /* set an appropriate set of permissions based on original
 368                    permissions and umask. This emulates what GNU cp does */
 369                 file->mode &= ~orig_umask;
 370         }
 371 }
 372
 373
 374 /* determine if a file in a different filesstem should be skipped
 375    when one_file_system is set. We bascally only want to include
 376    the mount points - but they can be hard to find! */
 377 static int skip_filesystem(char *fname, STRUCT_STAT *st)
 378 {
 379         STRUCT_STAT st2;
 380         char *p = strrchr(fname, '/');
 381
 382         /* skip all but directories */
 383         if (!S_ISDIR(st->st_mode)) return 1;
 384
 385         /* if its not a subdirectory then allow */
 386         if (!p) return 0;
 387
 388         *p = 0;
 389         if (link_stat(fname, &st2)) {
 390                 *p = '/';
 391                 return 0;
 392         }
 393         *p = '/';
 394
 395         return (st2.st_dev != filesystem_dev);
 396 }
 397
 398 static struct file_struct *make_file(int f, char *fname)
 399 {
 400         struct file_struct *file;
 401         STRUCT_STAT st;
 402         char sum[SUM_LENGTH];
 403         char *p;
 404         char cleaned_name[MAXPATHLEN];
 405         char linkbuf[MAXPATHLEN];
 406         extern int delete_excluded;
 407
 408         strlcpy(cleaned_name, fname, MAXPATHLEN);
 409         cleaned_name[MAXPATHLEN-1] = 0;
 410         clean_fname(cleaned_name);
 411         fname = cleaned_name;
 412
 413         memset(sum,0,SUM_LENGTH);
 414
 415         if (readlink_stat(fname,&st,linkbuf) != 0) {
 416                 io_error = 1;
 417                 rprintf(FERROR,"%s: %s\n",
 418                         fname,strerror(errno));
 419                 return NULL;
 420         }
 421
 422         if (S_ISDIR(st.st_mode) && !recurse) {
 423                 rprintf(FINFO,"skipping directory %s\n",fname);
 424                 return NULL;
 425         }
 426
 427         if (one_file_system && st.st_dev != filesystem_dev) {
 428                 if (skip_filesystem(fname, &st))
 429                         return NULL;
 430         }
 431
 432         /* f is set to -1 when calculating deletion file list */
 433         if (((f != -1) || !delete_excluded) && !match_file_name(fname,&st))
 434                 return NULL;
 435
 436         if (verbose > 2)
 437                 rprintf(FINFO,"make_file(%d,%s)\n",f,fname);
 438
 439         file = (struct file_struct *)malloc(sizeof(*file));
 440         if (!file) out_of_memory("make_file");
 441         memset((char *)file,0,sizeof(*file));
 442
 443         if ((p = strrchr(fname,'/'))) {
 444                 static char *lastdir;
 445                 *p = 0;
 446                 if (lastdir && strcmp(fname, lastdir)==0) {
 447                         file->dirname = lastdir;
 448                 } else {
 449                         file->dirname = strdup(fname);
 450                         lastdir = file->dirname;
 451                 }
 452                 file->basename = strdup(p+1);
 453                 *p = '/';
 454         } else {
 455                 file->dirname = NULL;
 456                 file->basename = strdup(fname);
 457         }
 458
 459         file->modtime = st.st_mtime;
 460         file->length = st.st_size;
 461         file->mode = st.st_mode;
 462         file->uid = st.st_uid;
 463         file->gid = st.st_gid;
 464         file->dev = st.st_dev;
 465         file->inode = st.st_ino;
 466 #ifdef HAVE_ST_RDEV
 467         file->rdev = st.st_rdev;
 468 #endif
 469
 470 #if SUPPORT_LINKS
 471         if (S_ISLNK(st.st_mode)) {
 472                 file->link = strdup(linkbuf);
 473         }
 474 #endif
 475
 476         if (always_checksum) {
 477                 file->sum = (char *)malloc(MD4_SUM_LENGTH);
 478                 if (!file->sum) out_of_memory("md4 sum");
 479                 /* drat. we have to provide a null checksum for non-regular
 480                    files in order to be compatible with earlier versions
 481                    of rsync */
 482                 if (S_ISREG(st.st_mode)) {
 483                         file_checksum(fname,file->sum,st.st_size);
 484                 } else {
 485                         memset(file->sum, 0, MD4_SUM_LENGTH);
 486                 }
 487         }
 488
 489         if (flist_dir) {
 490                 static char *lastdir;
 491                 if (lastdir && strcmp(lastdir, flist_dir)==0) {
 492                         file->basedir = lastdir;
 493                 } else {
 494                         file->basedir = strdup(flist_dir);
 495                         lastdir = file->basedir;
 496                 }
 497         } else {
 498                 file->basedir = NULL;
 499         }
 500
 501         if (!S_ISDIR(st.st_mode))
 502                 stats.total_size += st.st_size;
 503
 504         return file;
 505 }
 506
 507
 508
 509 void send_file_name(int f,struct file_list *flist,char *fname,
 510                            int recursive, unsigned base_flags)
 511 {
 512   struct file_struct *file;
 513
 514   file = make_file(f,fname);
 515
 516   if (!file) return;
 517
 518   if (flist->count >= flist->malloced) {
 519           if (flist->malloced < 1000)
 520                   flist->malloced += 1000;
 521           else
 522                   flist->malloced *= 2;
 523           flist->files = (struct file_struct **)realloc(flist->files,
 524                                                         sizeof(flist->files[0])*
 525                                                         flist->malloced);
 526           if (!flist->files)
 527                   out_of_memory("send_file_name");
 528   }
 529
 530   if (strcmp(file->basename,"")) {
 531     flist->files[flist->count++] = file;
 532     send_file_entry(file,f,base_flags);
 533   }
 534
 535   if (S_ISDIR(file->mode) && recursive) {
 536           struct exclude_struct **last_exclude_list = local_exclude_list;
 537           send_directory(f,flist,f_name(file));
 538           local_exclude_list = last_exclude_list;
 539           return;
 540   }
 541 }
 542
 543
 544
 545 static void send_directory(int f,struct file_list *flist,char *dir)
 546 {
 547         DIR *d;
 548         struct dirent *di;
 549         char fname[MAXPATHLEN];
 550         int l;
 551         char *p;
 552
 553         d = opendir(dir);
 554         if (!d) {
 555                 io_error = 1;
 556                 rprintf(FERROR,"opendir(%s): %s\n",
 557                         dir,strerror(errno));
 558                 return;
 559         }
 560
 561         strlcpy(fname,dir,MAXPATHLEN);
 562         l = strlen(fname);
 563         if (fname[l-1] != '/') {
 564                 if (l == MAXPATHLEN-1) {
 565                         io_error = 1;
 566                         rprintf(FERROR,"skipping long-named directory %s\n",fname);
 567                         closedir(d);
 568                         return;
 569                 }
 570                 strlcat(fname,"/", MAXPATHLEN);
 571                 l++;
 572         }
 573         p = fname + strlen(fname);
 574
 575         local_exclude_list = NULL;
 576
 577         if (cvs_exclude) {
 578                 if (strlen(fname) + strlen(".cvsignore") <= MAXPATHLEN-1) {
 579                         strcpy(p,".cvsignore");
 580                         local_exclude_list = make_exclude_list(fname,NULL,0,0);
 581                 } else {
 582                         io_error = 1;
 583                         rprintf(FINFO,"cannot cvs-exclude in long-named directory %s\n",fname);
 584                 }
 585         }
 586
 587         for (di=readdir(d); di; di=readdir(d)) {
 588                 char *dname = d_name(di);
 589                 if (strcmp(dname,".")==0 ||
 590                     strcmp(dname,"..")==0)
 591                         continue;
 592                 strlcpy(p,dname,MAXPATHLEN-l);
 593                 send_file_name(f,flist,fname,recurse,0);
 594         }
 595
 596         if (local_exclude_list) {
 597                 add_exclude_list("!", &local_exclude_list, 0);
 598         }
 599
 600         closedir(d);
 601 }
 602
 603
 604
 605 struct file_list *send_file_list(int f,int argc,char *argv[])
 606 {
 607         int i,l;
 608         STRUCT_STAT st;
 609         char *p,*dir,*olddir;
 610         char lastpath[MAXPATHLEN]="";
 611         struct file_list *flist;
 612         int64 start_write;
 613
 614         if (verbose && recurse && !am_server && f != -1) {
 615                 rprintf(FINFO,"building file list ... ");
 616                 rflush(FINFO);
 617         }
 618
 619         start_write = stats.total_written;
 620
 621         flist = (struct file_list *)malloc(sizeof(flist[0]));
 622         if (!flist) out_of_memory("send_file_list");
 623
 624         flist->count=0;
 625         flist->malloced = 1000;
 626         flist->files = (struct file_struct **)malloc(sizeof(flist->files[0])*
 627                                                      flist->malloced);
 628         if (!flist->files) out_of_memory("send_file_list");
 629
 630         if (f != -1) {
 631                 io_start_buffering(f);
 632         }
 633
 634         for (i=0;i<argc;i++) {
 635                 char *fname = topsrcname;
 636
 637                 strlcpy(fname,argv[i],MAXPATHLEN);
 638
 639                 l = strlen(fname);
 640                 if (l != 1 && fname[l-1] == '/') {
 641                         if ((l == 2) && (fname[0] == '.')) {
 642                                 /*  Turn ./ into just . rather than ./.
 643                                     This was put in to avoid a problem with
 644                                       rsync -aR --delete from ./
 645                                     The send_file_name() below of ./ was
 646                                     mysteriously preventing deletes */
 647                                 fname[1] = 0;
 648                         } else {
 649                                 strlcat(fname,".",MAXPATHLEN);
 650                         }
 651                 }
 652
 653                 if (link_stat(fname,&st) != 0) {
 654                         io_error=1;
 655                         rprintf(FERROR,"%s : %s\n",fname,strerror(errno));
 656                         continue;
 657                 }
 658
 659                 if (S_ISDIR(st.st_mode) && !recurse) {
 660                         rprintf(FINFO,"skipping directory %s\n",fname);
 661                         continue;
 662                 }
 663
 664                 dir = NULL;
 665                 olddir = NULL;
 666
 667                 if (!relative_paths) {
 668                         p = strrchr(fname,'/');
 669                         if (p) {
 670                                 *p = 0;
 671                                 if (p == fname)
 672                                         dir = "/";
 673                                 else
 674                                         dir = fname;
 675                                 fname = p+1;
 676                         }
 677                 } else if (f != -1 && (p=strrchr(fname,'/'))) {
 678                         /* this ensures we send the intermediate directories,
 679                            thus getting their permissions right */
 680                         *p = 0;
 681                         if (strcmp(lastpath,fname)) {
 682                                 strlcpy(lastpath, fname, sizeof(lastpath));
 683                                 *p = '/';
 684                                 for (p=fname+1; (p=strchr(p,'/')); p++) {
 685                                         int copy_links_saved = copy_links;
 686                                         *p = 0;
 687                                         copy_links = copy_unsafe_links;
 688                                         send_file_name(f, flist, fname, 0, 0);
 689                                         copy_links = copy_links_saved;
 690                                         *p = '/';
 691                                 }
 692                         } else {
 693                                 *p = '/';
 694                         }
 695                 }
 696
 697                 if (!*fname)
 698                         fname = ".";
 699
 700                 if (dir && *dir) {
 701                         olddir = push_dir(dir, 1);
 702
 703                         if (!olddir) {
 704                                 io_error=1;
 705                                 rprintf(FERROR,"push_dir %s : %s\n",
 706                                         dir,strerror(errno));
 707                                 continue;
 708                         }
 709
 710                         flist_dir = dir;
 711                 }
 712
 713                 if (one_file_system)
 714                         set_filesystem(fname);
 715
 716                 if (!recurse || !send_included_file_names(f,flist))
 717                         send_file_name(f,flist,fname,recurse,FLAG_DELETE);
 718
 719                 if (olddir != NULL) {
 720                         flist_dir = NULL;
 721                         if (pop_dir(olddir) != 0) {
 722                                 rprintf(FERROR,"pop_dir %s : %s\n",
 723                                         dir,strerror(errno));
 724                                 exit_cleanup(RERR_FILESELECT);
 725                         }
 726                 }
 727         }
 728
 729         topsrcname[0] = '\0';
 730
 731         if (f != -1) {
 732                 send_file_entry(NULL,f,0);
 733         }
 734
 735         if (verbose && recurse && !am_server && f != -1)
 736                 rprintf(FINFO,"done\n");
 737
 738         clean_flist(flist, 0);
 739
 740         /* now send the uid/gid list. This was introduced in protocol
 741            version 15 */
 742         if (f != -1 && remote_version >= 15) {
 743                 send_uid_list(f);
 744         }
 745
 746         /* if protocol version is >= 17 then send the io_error flag */
 747         if (f != -1 && remote_version >= 17) {
 748                 write_int(f, io_error);
 749         }
 750
 751         if (f != -1) {
 752                 io_end_buffering(f);
 753                 stats.flist_size = stats.total_written - start_write;
 754                 stats.num_files = flist->count;
 755         }
 756
 757         if (verbose > 2)
 758                 rprintf(FINFO,"send_file_list done\n");
 759
 760         return flist;
 761 }
 762
 763
 764 struct file_list *recv_file_list(int f)
 765 {
 766   struct file_list *flist;
 767   unsigned char flags;
 768   int64 start_read;
 769   extern int list_only;
 770
 771   if (verbose && recurse && !am_server) {
 772     rprintf(FINFO,"receiving file list ... ");
 773     rflush(FINFO);
 774   }
 775
 776   start_read = stats.total_read;
 777
 778   flist = (struct file_list *)malloc(sizeof(flist[0]));
 779   if (!flist)
 780     goto oom;
 781
 782   flist->count=0;
 783   flist->malloced=1000;
 784   flist->files = (struct file_struct **)malloc(sizeof(flist->files[0])*
 785                                                flist->malloced);
 786   if (!flist->files)
 787     goto oom;
 788
 789
 790   for (flags=read_byte(f); flags; flags=read_byte(f)) {
 791     int i = flist->count;
 792
 793     if (i >= flist->malloced) {
 794           if (flist->malloced < 1000)
 795                   flist->malloced += 1000;
 796           else
 797                   flist->malloced *= 2;
 798           flist->files =(struct file_struct **)realloc(flist->files,
 799                                                        sizeof(flist->files[0])*
 800                                                        flist->malloced);
 801           if (!flist->files)
 802                   goto oom;
 803     }
 804
 805     receive_file_entry(&flist->files[i],flags,f);
 806
 807     if (S_ISREG(flist->files[i]->mode))
 808             stats.total_size += flist->files[i]->length;
 809
 810     flist->count++;
 811
 812     if (verbose > 2)
 813       rprintf(FINFO,"recv_file_name(%s)\n",f_name(flist->files[i]));
 814   }
 815
 816
 817   if (verbose > 2)
 818     rprintf(FINFO,"received %d names\n",flist->count);
 819
 820   clean_flist(flist, relative_paths);
 821
 822   if (verbose && recurse && !am_server) {
 823     rprintf(FINFO,"done\n");
 824   }
 825
 826   /* now recv the uid/gid list. This was introduced in protocol version 15 */
 827   if (f != -1 && remote_version >= 15) {
 828           recv_uid_list(f, flist);
 829   }
 830
 831   /* if protocol version is >= 17 then recv the io_error flag */
 832   if (f != -1 && remote_version >= 17) {
 833           io_error |= read_int(f);
 834   }
 835
 836   if (list_only) {
 837           int i;
 838           for (i=0;i<flist->count;i++) {
 839                   list_file_entry(flist->files[i]);
 840           }
 841   }
 842
 843
 844   if (verbose > 2)
 845     rprintf(FINFO,"recv_file_list done\n");
 846
 847   stats.flist_size = stats.total_read - start_read;
 848   stats.num_files = flist->count;
 849
 850   return flist;
 851
 852 oom:
 853     out_of_memory("recv_file_list");
 854     return NULL; /* not reached */
 855 }
 856
 857
 858 int file_compare(struct file_struct **f1,struct file_struct **f2)
 859 {
 860         if (!(*f1)->basename && !(*f2)->basename) return 0;
 861         if (!(*f1)->basename) return -1;
 862         if (!(*f2)->basename) return 1;
 863         if ((*f1)->dirname == (*f2)->dirname)
 864                 return u_strcmp((*f1)->basename, (*f2)->basename);
 865         return u_strcmp(f_name(*f1),f_name(*f2));
 866 }
 867
 868
 869 int flist_find(struct file_list *flist,struct file_struct *f)
 870 {
 871         int low=0,high=flist->count-1;
 872
 873         if (flist->count <= 0) return -1;
 874
 875         while (low != high) {
 876                 int mid = (low+high)/2;
 877                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
 878                 if (ret == 0) return flist_up(flist, mid);
 879                 if (ret > 0) {
 880                         high=mid;
 881                 } else {
 882                         low=mid+1;
 883                 }
 884         }
 885
 886         if (file_compare(&flist->files[flist_up(flist,low)],&f) == 0)
 887                 return flist_up(flist,low);
 888         return -1;
 889 }
 890
 891
 892 /*
 893  * free up one file
 894  */
 895 static void free_file(struct file_struct *file)
 896 {
 897         if (!file) return;
 898         if (file->basename) free(file->basename);
 899         if (file->link) free(file->link);
 900         if (file->sum) free(file->sum);
 901         memset((char *)file, 0, sizeof(*file));
 902 }
 903
 904
 905 /*
 906  * free up all elements in a flist
 907  */
 908 void flist_free(struct file_list *flist)
 909 {
 910         int i;
 911         for (i=1;i<flist->count;i++) {
 912                 free_file(flist->files[i]);
 913                 free(flist->files[i]);
 914         }
 915         memset((char *)flist->files, 0, sizeof(flist->files[0])*flist->count);
 916         free(flist->files);
 917         memset((char *)flist, 0, sizeof(*flist));
 918         free(flist);
 919 }
 920
 921
 922 /*
 923  * This routine ensures we don't have any duplicate names in our file list.
 924  * duplicate names can cause corruption because of the pipelining
 925  */
 926 static void clean_flist(struct file_list *flist, int strip_root)
 927 {
 928         int i;
 929
 930         if (!flist || flist->count == 0)
 931                 return;
 932
 933         qsort(flist->files,flist->count,
 934               sizeof(flist->files[0]),
 935               (int (*)())file_compare);
 936
 937         for (i=1;i<flist->count;i++) {
 938                 if (flist->files[i]->basename &&
 939                     flist->files[i-1]->basename &&
 940                     strcmp(f_name(flist->files[i]),
 941                            f_name(flist->files[i-1])) == 0) {
 942                         if (verbose > 1 && !am_server)
 943                                 rprintf(FINFO,"removing duplicate name %s from file list %d\n",
 944                                         f_name(flist->files[i-1]),i-1);
 945                         free_file(flist->files[i]);
 946                 }
 947         }
 948
 949         if (strip_root) {
 950                 /* we need to strip off the root directory in the case
 951                    of relative paths, but this must be done _after_
 952                    the sorting phase */
 953                 for (i=0;i<flist->count;i++) {
 954                         if (flist->files[i]->dirname &&
 955                             flist->files[i]->dirname[0] == '/') {
 956                                 memmove(&flist->files[i]->dirname[0],
 957                                         &flist->files[i]->dirname[1],
 958                                         strlen(flist->files[i]->dirname));
 959                         }
 960
 961                         if (flist->files[i]->dirname &&
 962                             !flist->files[i]->dirname[0]) {
 963                                 flist->files[i]->dirname = NULL;
 964                         }
 965                 }
 966         }
 967
 968
 969         if (verbose <= 3) return;
 970
 971         for (i=0;i<flist->count;i++) {
 972                 rprintf(FINFO,"[%d] i=%d %s %s mode=0%o len=%d\n",
 973                         getpid(), i,
 974                         NS(flist->files[i]->dirname),
 975                         NS(flist->files[i]->basename),
 976                         flist->files[i]->mode,
 977                         (int)flist->files[i]->length);
 978         }
 979 }
 980
 981
 982 /*
 983  * return the full filename of a flist entry
 984  */
 985 char *f_name(struct file_struct *f)
 986 {
 987         static char names[10][MAXPATHLEN];
 988         static int n;
 989         char *p = names[n];
 990
 991         if (!f || !f->basename) return NULL;
 992
 993         n = (n+1)%10;
 994
 995         if (f->dirname) {
 996                 strlcpy(p, f->dirname, MAXPATHLEN);
 997                 strlcat(p, "/", MAXPATHLEN);
 998                 strlcat(p, f->basename, MAXPATHLEN);
 999         } else {
1000                 strlcpy(p, f->basename, MAXPATHLEN);
1001         }
1002
1003         return p;
1004 }
1005