| 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 | #include "rsync.h" |
| 21 | |
| 22 | extern int verbose; |
| 23 | extern int recurse; |
| 24 | extern int delete_mode; |
| 25 | extern int remote_version; |
| 26 | extern int csum_length; |
| 27 | extern struct stats stats; |
| 28 | extern int dry_run; |
| 29 | extern int am_server; |
| 30 | extern int relative_paths; |
| 31 | extern int preserve_hard_links; |
| 32 | extern int cvs_exclude; |
| 33 | extern int io_error; |
| 34 | extern char *tmpdir; |
| 35 | extern char *compare_dest; |
| 36 | extern int make_backups; |
| 37 | extern char *backup_suffix; |
| 38 | |
| 39 | |
| 40 | static struct delete_list { |
| 41 | dev_t dev; |
| 42 | INO_T inode; |
| 43 | } *delete_list; |
| 44 | static int dlist_len, dlist_alloc_len; |
| 45 | |
| 46 | |
| 47 | /* yuck! This function wouldn't have been necessary if I had the sorting |
| 48 | algorithm right. Unfortunately fixing the sorting algorithm would introduce |
| 49 | a backward incompatibility as file list indexes are sent over the link. |
| 50 | */ |
| 51 | static int delete_already_done(struct file_list *flist,int j) |
| 52 | { |
| 53 | int i; |
| 54 | STRUCT_STAT st; |
| 55 | |
| 56 | if (link_stat(f_name(flist->files[j]), &st)) return 1; |
| 57 | |
| 58 | for (i=0;i<dlist_len;i++) { |
| 59 | if (st.st_ino == delete_list[i].inode && |
| 60 | st.st_dev == delete_list[i].dev) |
| 61 | return 1; |
| 62 | } |
| 63 | |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | static void add_delete_entry(struct file_struct *file) |
| 68 | { |
| 69 | if (dlist_len == dlist_alloc_len) { |
| 70 | dlist_alloc_len += 1024; |
| 71 | delete_list = (struct delete_list *)Realloc(delete_list, sizeof(delete_list[0])*dlist_alloc_len); |
| 72 | if (!delete_list) out_of_memory("add_delete_entry"); |
| 73 | } |
| 74 | |
| 75 | delete_list[dlist_len].dev = file->dev; |
| 76 | delete_list[dlist_len].inode = file->inode; |
| 77 | dlist_len++; |
| 78 | |
| 79 | if (verbose > 3) |
| 80 | rprintf(FINFO,"added %s to delete list\n", f_name(file)); |
| 81 | } |
| 82 | |
| 83 | static void delete_one(struct file_struct *f) |
| 84 | { |
| 85 | if (!S_ISDIR(f->mode)) { |
| 86 | if (do_unlink(f_name(f)) != 0) { |
| 87 | rprintf(FERROR,"unlink %s : %s\n",f_name(f),strerror(errno)); |
| 88 | } else if (verbose) { |
| 89 | rprintf(FINFO,"deleting %s\n",f_name(f)); |
| 90 | } |
| 91 | } else { |
| 92 | if (do_rmdir(f_name(f)) != 0) { |
| 93 | if (errno != ENOTEMPTY && errno != EEXIST) |
| 94 | rprintf(FERROR,"rmdir %s : %s\n",f_name(f),strerror(errno)); |
| 95 | } else if (verbose) { |
| 96 | rprintf(FINFO,"deleting directory %s\n",f_name(f)); |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | |
| 102 | |
| 103 | |
| 104 | /* this deletes any files on the receiving side that are not present |
| 105 | on the sending side. For version 1.6.4 I have changed the behaviour |
| 106 | to match more closely what most people seem to expect of this option */ |
| 107 | static void delete_files(struct file_list *flist) |
| 108 | { |
| 109 | struct file_list *local_file_list; |
| 110 | int i, j; |
| 111 | char *name; |
| 112 | |
| 113 | if (cvs_exclude) |
| 114 | add_cvs_excludes(); |
| 115 | |
| 116 | if (io_error) { |
| 117 | rprintf(FINFO,"IO error encountered - skipping file deletion\n"); |
| 118 | return; |
| 119 | } |
| 120 | |
| 121 | for (j=0;j<flist->count;j++) { |
| 122 | if (!S_ISDIR(flist->files[j]->mode) || |
| 123 | !(flist->files[j]->flags & FLAG_DELETE)) continue; |
| 124 | |
| 125 | if (remote_version < 19 && |
| 126 | delete_already_done(flist, j)) continue; |
| 127 | |
| 128 | name = strdup(f_name(flist->files[j])); |
| 129 | |
| 130 | if (!(local_file_list = send_file_list(-1,1,&name))) { |
| 131 | free(name); |
| 132 | continue; |
| 133 | } |
| 134 | |
| 135 | if (verbose > 1) |
| 136 | rprintf(FINFO,"deleting in %s\n", name); |
| 137 | |
| 138 | for (i=local_file_list->count-1;i>=0;i--) { |
| 139 | if (!local_file_list->files[i]->basename) continue; |
| 140 | if (remote_version < 19 && |
| 141 | S_ISDIR(local_file_list->files[i]->mode)) |
| 142 | add_delete_entry(local_file_list->files[i]); |
| 143 | if (-1 == flist_find(flist,local_file_list->files[i])) { |
| 144 | char *f = f_name(local_file_list->files[i]); |
| 145 | int k = strlen(f) - strlen(backup_suffix); |
| 146 | if (make_backups && ((k <= 0) || |
| 147 | (strcmp(f+k,backup_suffix) != 0))) { |
| 148 | (void) make_backup(f); |
| 149 | } else { |
| 150 | delete_one(local_file_list->files[i]); |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | flist_free(local_file_list); |
| 155 | free(name); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | |
| 160 | static int get_tmpname(char *fnametmp, char *fname) |
| 161 | { |
| 162 | char *f; |
| 163 | |
| 164 | /* open tmp file */ |
| 165 | if (tmpdir) { |
| 166 | f = strrchr(fname,'/'); |
| 167 | if (f == NULL) |
| 168 | f = fname; |
| 169 | else |
| 170 | f++; |
| 171 | if (strlen(tmpdir)+strlen(f)+10 > MAXPATHLEN) { |
| 172 | rprintf(FERROR,"filename too long\n"); |
| 173 | return 0; |
| 174 | } |
| 175 | slprintf(fnametmp,MAXPATHLEN, "%s/.%s.XXXXXX",tmpdir,f); |
| 176 | return 1; |
| 177 | } |
| 178 | |
| 179 | f = strrchr(fname,'/'); |
| 180 | |
| 181 | if (strlen(fname)+9 > MAXPATHLEN) { |
| 182 | rprintf(FERROR,"filename too long\n"); |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | if (f) { |
| 187 | *f = 0; |
| 188 | slprintf(fnametmp,MAXPATHLEN,"%s/.%s.XXXXXX", |
| 189 | fname,f+1); |
| 190 | *f = '/'; |
| 191 | } else { |
| 192 | slprintf(fnametmp,MAXPATHLEN,".%s.XXXXXX",fname); |
| 193 | } |
| 194 | |
| 195 | return 1; |
| 196 | } |
| 197 | |
| 198 | |
| 199 | static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname, |
| 200 | OFF_T total_size) |
| 201 | { |
| 202 | int i,n,remainder,len,count; |
| 203 | OFF_T offset = 0; |
| 204 | OFF_T offset2; |
| 205 | char *data; |
| 206 | static char file_sum1[MD4_SUM_LENGTH]; |
| 207 | static char file_sum2[MD4_SUM_LENGTH]; |
| 208 | char *map=NULL; |
| 209 | |
| 210 | count = read_int(f_in); |
| 211 | n = read_int(f_in); |
| 212 | remainder = read_int(f_in); |
| 213 | |
| 214 | sum_init(); |
| 215 | |
| 216 | for (i=recv_token(f_in,&data); i != 0; i=recv_token(f_in,&data)) { |
| 217 | |
| 218 | show_progress(offset, total_size); |
| 219 | |
| 220 | if (i > 0) { |
| 221 | extern int cleanup_got_literal; |
| 222 | |
| 223 | if (verbose > 3) { |
| 224 | rprintf(FINFO,"data recv %d at %d\n", |
| 225 | i,(int)offset); |
| 226 | } |
| 227 | |
| 228 | stats.literal_data += i; |
| 229 | cleanup_got_literal = 1; |
| 230 | |
| 231 | sum_update(data,i); |
| 232 | |
| 233 | if (fd != -1 && write_file(fd,data,i) != i) { |
| 234 | rprintf(FERROR,"write failed on %s : %s\n",fname,strerror(errno)); |
| 235 | exit_cleanup(RERR_FILEIO); |
| 236 | } |
| 237 | offset += i; |
| 238 | continue; |
| 239 | } |
| 240 | |
| 241 | i = -(i+1); |
| 242 | offset2 = i*n; |
| 243 | len = n; |
| 244 | if (i == count-1 && remainder != 0) |
| 245 | len = remainder; |
| 246 | |
| 247 | stats.matched_data += len; |
| 248 | |
| 249 | if (verbose > 3) |
| 250 | rprintf(FINFO,"chunk[%d] of size %d at %d offset=%d\n", |
| 251 | i,len,(int)offset2,(int)offset); |
| 252 | |
| 253 | map = map_ptr(buf,offset2,len); |
| 254 | |
| 255 | see_token(map, len); |
| 256 | sum_update(map,len); |
| 257 | |
| 258 | if (fd != -1 && write_file(fd,map,len) != len) { |
| 259 | rprintf(FERROR,"write failed on %s : %s\n", |
| 260 | fname,strerror(errno)); |
| 261 | exit_cleanup(RERR_FILEIO); |
| 262 | } |
| 263 | offset += len; |
| 264 | } |
| 265 | |
| 266 | end_progress(); |
| 267 | |
| 268 | if (fd != -1 && offset > 0 && sparse_end(fd) != 0) { |
| 269 | rprintf(FERROR,"write failed on %s : %s\n", |
| 270 | fname,strerror(errno)); |
| 271 | exit_cleanup(RERR_FILEIO); |
| 272 | } |
| 273 | |
| 274 | sum_end(file_sum1); |
| 275 | |
| 276 | if (remote_version >= 14) { |
| 277 | read_buf(f_in,file_sum2,MD4_SUM_LENGTH); |
| 278 | if (verbose > 2) { |
| 279 | rprintf(FINFO,"got file_sum\n"); |
| 280 | } |
| 281 | if (fd != -1 && |
| 282 | memcmp(file_sum1,file_sum2,MD4_SUM_LENGTH) != 0) { |
| 283 | return 0; |
| 284 | } |
| 285 | } |
| 286 | return 1; |
| 287 | } |
| 288 | |
| 289 | |
| 290 | |
| 291 | int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) |
| 292 | { |
| 293 | int fd1,fd2; |
| 294 | STRUCT_STAT st; |
| 295 | char *fname; |
| 296 | char fnametmp[MAXPATHLEN]; |
| 297 | char *fnamecmp; |
| 298 | char fnamecmpbuf[MAXPATHLEN]; |
| 299 | struct map_struct *buf; |
| 300 | int i; |
| 301 | struct file_struct *file; |
| 302 | int phase=0; |
| 303 | int recv_ok; |
| 304 | extern struct stats stats; |
| 305 | struct stats initial_stats; |
| 306 | |
| 307 | if (verbose > 2) { |
| 308 | rprintf(FINFO,"recv_files(%d) starting\n",flist->count); |
| 309 | } |
| 310 | |
| 311 | if (recurse && delete_mode && !local_name && flist->count>0) { |
| 312 | delete_files(flist); |
| 313 | } |
| 314 | |
| 315 | while (1) { |
| 316 | cleanup_disable(); |
| 317 | |
| 318 | i = read_int(f_in); |
| 319 | if (i == -1) { |
| 320 | if (phase==0 && remote_version >= 13) { |
| 321 | phase++; |
| 322 | csum_length = SUM_LENGTH; |
| 323 | if (verbose > 2) |
| 324 | rprintf(FINFO,"recv_files phase=%d\n",phase); |
| 325 | write_int(f_gen,-1); |
| 326 | continue; |
| 327 | } |
| 328 | break; |
| 329 | } |
| 330 | |
| 331 | if (i < 0 || i >= flist->count) { |
| 332 | rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n", |
| 333 | i, flist->count); |
| 334 | exit_cleanup(RERR_PROTOCOL); |
| 335 | } |
| 336 | |
| 337 | file = flist->files[i]; |
| 338 | fname = f_name(file); |
| 339 | |
| 340 | stats.num_transferred_files++; |
| 341 | stats.total_transferred_size += file->length; |
| 342 | |
| 343 | if (local_name) |
| 344 | fname = local_name; |
| 345 | |
| 346 | if (dry_run) { |
| 347 | if (!am_server) { |
| 348 | log_transfer(file, fname); |
| 349 | } |
| 350 | continue; |
| 351 | } |
| 352 | |
| 353 | initial_stats = stats; |
| 354 | |
| 355 | if (verbose > 2) |
| 356 | rprintf(FINFO,"recv_files(%s)\n",fname); |
| 357 | |
| 358 | fnamecmp = fname; |
| 359 | |
| 360 | /* open the file */ |
| 361 | fd1 = open(fnamecmp,O_RDONLY); |
| 362 | |
| 363 | if ((fd1 == -1) && (compare_dest != NULL)) { |
| 364 | /* try the file at compare_dest instead */ |
| 365 | slprintf(fnamecmpbuf,MAXPATHLEN,"%s/%s", |
| 366 | compare_dest,fname); |
| 367 | fnamecmp = fnamecmpbuf; |
| 368 | fd1 = open(fnamecmp,O_RDONLY); |
| 369 | } |
| 370 | |
| 371 | if (fd1 != -1 && do_fstat(fd1,&st) != 0) { |
| 372 | rprintf(FERROR,"fstat %s : %s\n",fnamecmp,strerror(errno)); |
| 373 | receive_data(f_in,NULL,-1,NULL,file->length); |
| 374 | close(fd1); |
| 375 | continue; |
| 376 | } |
| 377 | |
| 378 | if (fd1 != -1 && !S_ISREG(st.st_mode)) { |
| 379 | rprintf(FERROR,"%s : not a regular file (recv_files)\n",fnamecmp); |
| 380 | receive_data(f_in,NULL,-1,NULL,file->length); |
| 381 | close(fd1); |
| 382 | continue; |
| 383 | } |
| 384 | |
| 385 | if (fd1 != -1 && st.st_size > 0) { |
| 386 | buf = map_file(fd1,st.st_size); |
| 387 | if (verbose > 2) |
| 388 | rprintf(FINFO,"recv mapped %s of size %d\n",fnamecmp,(int)st.st_size); |
| 389 | } else { |
| 390 | buf = NULL; |
| 391 | } |
| 392 | |
| 393 | if (!get_tmpname(fnametmp,fname)) { |
| 394 | if (buf) unmap_file(buf); |
| 395 | if (fd1 != -1) close(fd1); |
| 396 | continue; |
| 397 | } |
| 398 | |
| 399 | /* mktemp is deliberately used here instead of mkstemp. |
| 400 | because O_EXCL is used on the open, the race condition |
| 401 | is not a problem or a security hole, and we want to |
| 402 | control the access permissions on the created file. */ |
| 403 | if (NULL == do_mktemp(fnametmp)) { |
| 404 | rprintf(FERROR,"mktemp %s failed\n",fnametmp); |
| 405 | receive_data(f_in,buf,-1,NULL,file->length); |
| 406 | if (buf) unmap_file(buf); |
| 407 | if (fd1 != -1) close(fd1); |
| 408 | continue; |
| 409 | } |
| 410 | |
| 411 | /* we initially set the perms without the |
| 412 | setuid/setgid bits to ensure that there is no race |
| 413 | condition. They are then correctly updated after |
| 414 | the lchown. Thanks to snabb@epipe.fi for pointing |
| 415 | this out */ |
| 416 | fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL, |
| 417 | file->mode & ACCESSPERMS); |
| 418 | |
| 419 | if (fd2 == -1 && relative_paths && errno == ENOENT && |
| 420 | create_directory_path(fnametmp) == 0) { |
| 421 | fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL, |
| 422 | file->mode & ACCESSPERMS); |
| 423 | } |
| 424 | if (fd2 == -1) { |
| 425 | rprintf(FERROR,"open %s : %s\n",fnametmp,strerror(errno)); |
| 426 | receive_data(f_in,buf,-1,NULL,file->length); |
| 427 | if (buf) unmap_file(buf); |
| 428 | if (fd1 != -1) close(fd1); |
| 429 | continue; |
| 430 | } |
| 431 | |
| 432 | cleanup_set(fnametmp, fname, file, buf, fd1, fd2); |
| 433 | |
| 434 | if (!am_server) { |
| 435 | log_transfer(file, fname); |
| 436 | } |
| 437 | |
| 438 | /* recv file data */ |
| 439 | recv_ok = receive_data(f_in,buf,fd2,fname,file->length); |
| 440 | |
| 441 | log_recv(file, &initial_stats); |
| 442 | |
| 443 | if (buf) unmap_file(buf); |
| 444 | if (fd1 != -1) { |
| 445 | close(fd1); |
| 446 | } |
| 447 | close(fd2); |
| 448 | |
| 449 | if (verbose > 2) |
| 450 | rprintf(FINFO,"renaming %s to %s\n",fnametmp,fname); |
| 451 | |
| 452 | finish_transfer(fname, fnametmp, file); |
| 453 | |
| 454 | cleanup_disable(); |
| 455 | |
| 456 | if (!recv_ok) { |
| 457 | if (csum_length == SUM_LENGTH) { |
| 458 | rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n", |
| 459 | fname); |
| 460 | } else { |
| 461 | if (verbose > 1) |
| 462 | rprintf(FINFO,"redoing %s(%d)\n",fname,i); |
| 463 | write_int(f_gen,i); |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | if (preserve_hard_links) |
| 469 | do_hard_links(flist); |
| 470 | |
| 471 | /* now we need to fix any directory permissions that were |
| 472 | modified during the transfer */ |
| 473 | for (i = 0; i < flist->count; i++) { |
| 474 | file = flist->files[i]; |
| 475 | if (!file->basename || !S_ISDIR(file->mode)) continue; |
| 476 | recv_generator(f_name(file),flist,i,-1); |
| 477 | } |
| 478 | |
| 479 | if (verbose > 2) |
| 480 | rprintf(FINFO,"recv_files finished\n"); |
| 481 | |
| 482 | return 0; |
| 483 | } |
| 484 | |