1 /* $OpenBSD: server.c,v 1.16 2003/07/07 14:39:26 mpech Exp $ */ 2 3 /* 4 * Copyright (c) 1983 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 #include "defs.h" 32 33 #ifndef lint 34 #if 0 35 static char RCSid[] __attribute__((__unused__)) = 36 "$From: server.c,v 1.10 1999/08/04 15:57:33 christos Exp $"; 37 #else 38 static char RCSid[] __attribute__((__unused__)) = 39 "$OpenBSD: server.c,v 1.16 2003/07/07 14:39:26 mpech Exp $"; 40 #endif 41 42 static char sccsid[] __attribute__((__unused__)) = 43 "@(#)server.c 5.3 (Berkeley) 6/7/86"; 44 45 static char copyright[] __attribute__((__unused__)) = 46 "@(#) Copyright (c) 1983 Regents of the University of California.\n\ 47 All rights reserved.\n"; 48 #endif /* not lint */ 49 50 /* 51 * Server routines 52 */ 53 54 char tempname[sizeof _RDIST_TMP + 1]; /* Tmp file name */ 55 char buf[BUFSIZ]; /* general purpose buffer */ 56 char target[MAXPATHLEN]; /* target/source directory name */ 57 char *ptarget; /* pointer to end of target name */ 58 int catname = 0; /* cat name to target name */ 59 char *sptarget[32]; /* stack of saved ptarget's for directories */ 60 char *fromhost = NULL; /* Client hostname */ 61 static long min_freespace = 0; /* Minimium free space on a filesystem */ 62 static long min_freefiles = 0; /* Minimium free # files on a filesystem */ 63 int oumask; /* Old umask */ 64 65 static int cattarget(char *); 66 static int setownership(char *, int, UID_T, GID_T, int); 67 static int setfilemode(char *, int, int, int); 68 static int fchog(int, char *, char *, char *, int); 69 static int removefile(struct stat *, int); 70 static void doclean(char *); 71 static void clean(char *); 72 static void dospecial(char *); 73 static void docmdspecial(void); 74 static void query(char *); 75 static int chkparent(char *, opt_t); 76 static char *savetarget(char *, opt_t); 77 static void recvfile(char *, opt_t, int, char *, char *, time_t, time_t, off_t); 78 static void recvdir(opt_t, int, char *, char *); 79 static void recvlink(char *, opt_t, int, off_t); 80 static void hardlink(char *); 81 static void setconfig(char *); 82 static void recvit(char *, int); 83 static void dochmog(char *); 84 static void settarget(char *, int); 85 86 /* 87 * Cat "string" onto the target buffer with error checking. 88 */ 89 static int 90 cattarget(char *string) 91 { 92 if (strlen(string) + strlen(target) + 2 > sizeof(target)) { 93 message(MT_INFO, "target buffer is not large enough."); 94 return(-1); 95 } 96 if (!ptarget) { 97 message(MT_INFO, "NULL target pointer set."); 98 return(-10); 99 } 100 101 (void) snprintf(ptarget, sizeof(target) - (ptarget - target), 102 "/%s", string); 103 104 return(0); 105 } 106 107 /* 108 * Set uid and gid ownership of a file. 109 */ 110 static int 111 setownership(char *file, int fd, UID_T uid, GID_T gid, int link) 112 { 113 int status = -1; 114 115 /* 116 * We assume only the Superuser can change uid ownership. 117 */ 118 if (getuid() != 0) 119 uid = -1; 120 121 /* 122 * If we are dealing with a symlink, only try to change it if 123 * we have lchown, if we don't leave it alone. 124 */ 125 #if defined(HAVE_LCHOWN) 126 if (link) 127 status = lchown(file, (CHOWN_UID_T) uid, 128 (CHOWN_GID_T) gid); 129 #else 130 if (link) 131 return 0; 132 #endif 133 134 #if defined(HAVE_FCHOWN) 135 if (fd != -1 && !link) 136 status = fchown(fd, (CHOWN_UID_T) uid, 137 (CHOWN_GID_T) gid); 138 #endif 139 if (status < 0 && !link) 140 status = chown(file, (CHOWN_UID_T) uid, 141 (CHOWN_GID_T) gid); 142 143 if (status < 0) { 144 if (uid == (UID_T) -1) 145 message(MT_NOTICE, "%s: chgrp %d failed: %s", 146 target, gid, SYSERR); 147 else 148 message(MT_NOTICE, "%s: chown %d.%d failed: %s", 149 target, uid, gid, SYSERR); 150 return(-1); 151 } 152 153 return(0); 154 } 155 156 /* 157 * Set mode of a file 158 */ 159 static int 160 setfilemode(char *file, int fd, int mode, int link) 161 { 162 int status = -1; 163 164 if (mode == -1) 165 return(0); 166 167 /* 168 * If we are dealing with a symlink, only try to change it if 169 * we have lchown, if we don't leave it alone. 170 */ 171 #if defined(HAVE_LCHMOD) 172 if (link) 173 status = lchmod(file, mode); 174 #else 175 if (link) 176 return 0; 177 #endif 178 179 #if defined(HAVE_FCHMOD) 180 if (fd != -1 && !link) 181 status = fchmod(fd, mode); 182 #endif 183 184 if (status < 0 && !link) 185 status = chmod(file, mode); 186 187 if (status < 0) { 188 message(MT_NOTICE, "%s: chmod failed: %s", target, SYSERR); 189 return(-1); 190 } 191 192 return(0); 193 } 194 /* 195 * Change owner, group and mode of file. 196 */ 197 static int 198 fchog(int fd, char *file, char *owner, char *group, int mode) 199 { 200 static struct group *gr = NULL; 201 extern char *locuser; 202 int i; 203 struct stat st; 204 UID_T uid; 205 GID_T gid; 206 GID_T primegid = (GID_T)-2; 207 208 uid = userid; 209 if (userid == 0) { /* running as root; take anything */ 210 if (*owner == ':') { 211 uid = (UID_T) atoi(owner + 1); 212 } else if (pw == NULL || strcmp(owner, pw->pw_name) != 0) { 213 if ((pw = getpwnam(owner)) == NULL) { 214 if (mode != -1 && IS_ON(mode, S_ISUID)) { 215 message(MT_NOTICE, 216 "%s: unknown login name \"%s\", clearing setuid", 217 target, owner); 218 mode &= ~S_ISUID; 219 uid = 0; 220 } else 221 message(MT_NOTICE, 222 "%s: unknown login name \"%s\"", 223 target, owner); 224 } else 225 uid = pw->pw_uid; 226 } else { 227 uid = pw->pw_uid; 228 primegid = pw->pw_gid; 229 } 230 if (*group == ':') { 231 gid = (GID_T) atoi(group + 1); 232 goto ok; 233 } 234 } else { /* not root, setuid only if user==owner */ 235 struct passwd *lupw; 236 237 if (mode != -1) { 238 if (IS_ON(mode, S_ISUID) && 239 strcmp(locuser, owner) != 0) 240 mode &= ~S_ISUID; 241 if (mode) 242 mode &= ~S_ISVTX; /* and strip sticky too */ 243 } 244 245 if ((lupw = getpwnam(locuser)) != NULL) 246 primegid = lupw->pw_gid; 247 } 248 249 gid = (GID_T) -1; 250 if (gr == NULL || strcmp(group, gr->gr_name) != 0) { 251 if ((*group == ':' && 252 (getgrgid(gid = atoi(group + 1)) == NULL)) 253 || ((gr = (struct group *)getgrnam(group)) == NULL)) { 254 if (mode != -1 && IS_ON(mode, S_ISGID)) { 255 message(MT_NOTICE, 256 "%s: unknown group \"%s\", clearing setgid", 257 target, group); 258 mode &= ~S_ISGID; 259 } else 260 message(MT_NOTICE, 261 "%s: unknown group \"%s\"", 262 target, group); 263 } else 264 gid = gr->gr_gid; 265 } else 266 gid = gr->gr_gid; 267 268 if (userid && gid >= 0 && gid != primegid) { 269 if (gr) 270 for (i = 0; gr->gr_mem[i] != NULL; i++) 271 if (strcmp(locuser, gr->gr_mem[i]) == 0) 272 goto ok; 273 if (mode != -1 && IS_ON(mode, S_ISGID)) { 274 message(MT_NOTICE, 275 "%s: user %s not in group %s, clearing setgid", 276 target, locuser, group); 277 mode &= ~S_ISGID; 278 } 279 gid = (GID_T) -1; 280 } 281 ok: 282 if (stat(file, &st) == -1) { 283 error("%s: Stat failed %s", file, SYSERR); 284 return -1; 285 } 286 /* 287 * Set uid and gid ownership. If that fails, strip setuid and 288 * setgid bits from mode. Once ownership is set, successful 289 * or otherwise, set the new file mode. 290 */ 291 if (setownership(file, fd, uid, gid, S_ISLNK(st.st_mode)) < 0) { 292 if (mode != -1 && IS_ON(mode, S_ISUID)) { 293 message(MT_NOTICE, 294 "%s: chown failed, clearing setuid", target); 295 mode &= ~S_ISUID; 296 } 297 if (mode != -1 && IS_ON(mode, S_ISGID)) { 298 message(MT_NOTICE, 299 "%s: chown failed, clearing setgid", target); 300 mode &= ~S_ISGID; 301 } 302 } 303 (void) setfilemode(file, fd, mode, S_ISLNK(st.st_mode)); 304 305 306 return(0); 307 } 308 309 /* 310 * Remove a file or directory (recursively) and send back an acknowledge 311 * or an error message. 312 */ 313 static int 314 removefile(struct stat *statb, int silent) 315 { 316 DIR *d; 317 static DIRENTRY *dp; 318 char *cp; 319 struct stat stb; 320 char *optarget; 321 int len, failures = 0; 322 323 switch (statb->st_mode & S_IFMT) { 324 case S_IFREG: 325 case S_IFLNK: 326 case S_IFCHR: 327 case S_IFBLK: 328 #ifdef S_IFSOCK 329 case S_IFSOCK: 330 #endif 331 #ifdef S_IFIFO 332 case S_IFIFO: 333 #endif 334 if (unlink(target) < 0) { 335 if (errno == ETXTBSY) { 336 if (!silent) 337 message(MT_REMOTE|MT_NOTICE, 338 "%s: unlink failed: %s", 339 target, SYSERR); 340 return(0); 341 } else { 342 error("%s: unlink failed: %s", target, SYSERR); 343 return(-1); 344 } 345 } 346 goto removed; 347 348 case S_IFDIR: 349 break; 350 351 default: 352 error("%s: not a plain file", target); 353 return(-1); 354 } 355 356 errno = 0; 357 if ((d = opendir(target)) == NULL) { 358 error("%s: opendir failed: %s", target, SYSERR); 359 return(-1); 360 } 361 362 optarget = ptarget; 363 len = ptarget - target; 364 while ((dp = readdir(d)) != NULL) { 365 if ((D_NAMLEN(dp) == 1 && dp->d_name[0] == '.') || 366 (D_NAMLEN(dp) == 2 && dp->d_name[0] == '.' && 367 dp->d_name[1] == '.')) 368 continue; 369 370 if (len + 1 + (int)strlen(dp->d_name) >= MAXPATHLEN - 1) { 371 if (!silent) 372 message(MT_REMOTE|MT_WARNING, 373 "%s/%s: Name too long", 374 target, dp->d_name); 375 continue; 376 } 377 ptarget = optarget; 378 *ptarget++ = '/'; 379 cp = dp->d_name;; 380 while ((*ptarget++ = *cp++) != '\0') 381 continue; 382 ptarget--; 383 if (lstat(target, &stb) < 0) { 384 if (!silent) 385 message(MT_REMOTE|MT_WARNING, 386 "%s: lstat failed: %s", 387 target, SYSERR); 388 continue; 389 } 390 if (removefile(&stb, 0) < 0) 391 ++failures; 392 } 393 (void) closedir(d); 394 ptarget = optarget; 395 *ptarget = CNULL; 396 397 if (failures) 398 return(-1); 399 400 if (rmdir(target) < 0) { 401 error("%s: rmdir failed: %s", target, SYSERR); 402 return(-1); 403 } 404 removed: 405 #if NEWWAY 406 if (!silent) 407 message(MT_CHANGE|MT_REMOTE, "%s: removed", target); 408 #else 409 /* 410 * We use MT_NOTICE instead of MT_CHANGE because this function is 411 * sometimes called by other functions that are suppose to return a 412 * single ack() back to the client (rdist). This is a kludge until 413 * the Rdist protocol is re-done. Sigh. 414 */ 415 message(MT_NOTICE|MT_REMOTE, "%s: removed", target); 416 #endif 417 return(0); 418 } 419 420 /* 421 * Check the current directory (initialized by the 'T' command to server()) 422 * for extraneous files and remove them. 423 */ 424 static void 425 doclean(char *cp) 426 { 427 DIR *d; 428 DIRENTRY *dp; 429 struct stat stb; 430 char *optarget, *ep; 431 int len; 432 opt_t opts; 433 char targ[MAXPATHLEN*4]; 434 435 opts = strtol(cp, &ep, 8); 436 if (*ep != CNULL) { 437 error("clean: options not delimited"); 438 return; 439 } 440 if ((d = opendir(target)) == NULL) { 441 error("%s: opendir failed: %s", target, SYSERR); 442 return; 443 } 444 ack(); 445 446 optarget = ptarget; 447 len = ptarget - target; 448 while ((dp = readdir(d)) != NULL) { 449 if ((D_NAMLEN(dp) == 1 && dp->d_name[0] == '.') || 450 (D_NAMLEN(dp) == 2 && dp->d_name[0] == '.' && 451 dp->d_name[1] == '.')) 452 continue; 453 454 if (len + 1 + (int)strlen(dp->d_name) >= MAXPATHLEN - 1) { 455 message(MT_REMOTE|MT_WARNING, "%s/%s: Name too long", 456 target, dp->d_name); 457 continue; 458 } 459 ptarget = optarget; 460 *ptarget++ = '/'; 461 cp = dp->d_name;; 462 while ((*ptarget++ = *cp++) != '\0') 463 continue; 464 ptarget--; 465 if (lstat(target, &stb) < 0) { 466 message(MT_REMOTE|MT_WARNING, "%s: lstat failed: %s", 467 target, SYSERR); 468 continue; 469 } 470 471 ENCODE(targ, dp->d_name); 472 (void) sendcmd(CC_QUERY, "%s", targ); 473 (void) remline(cp = buf, sizeof(buf), TRUE); 474 475 if (*cp != CC_YES) 476 continue; 477 478 if (IS_ON(opts, DO_VERIFY)) 479 message(MT_REMOTE|MT_INFO, "%s: need to remove", 480 target); 481 else 482 (void) removefile(&stb, 0); 483 } 484 (void) closedir(d); 485 486 ptarget = optarget; 487 *ptarget = CNULL; 488 } 489 490 /* 491 * Frontend to doclean(). 492 */ 493 static void 494 clean(char *cp) 495 { 496 doclean(cp); 497 (void) sendcmd(CC_END, NULL); 498 (void) response(); 499 } 500 501 /* 502 * Execute a shell command to handle special cases. 503 * We can't really set an alarm timeout here since we 504 * have no idea how long the command should take. 505 */ 506 static void 507 dospecial(char *xcmd) 508 { 509 char cmd[BUFSIZ]; 510 if (DECODE(cmd, xcmd) == -1) { 511 error("dospecial: Cannot decode command."); 512 return; 513 } 514 runcommand(cmd); 515 } 516 517 /* 518 * Do a special cmd command. This differs from normal special 519 * commands in that it's done after an entire command has been updated. 520 * The list of updated target files is sent one at a time with RC_FILE 521 * commands. Each one is added to an environment variable defined by 522 * E_FILES. When an RC_COMMAND is finally received, the E_FILES variable 523 * is stuffed into our environment and a normal dospecial() command is run. 524 */ 525 static void 526 docmdspecial(void) 527 { 528 char *cp; 529 char *cmd, *env = NULL; 530 int n; 531 size_t len; 532 533 /* We're ready */ 534 ack(); 535 536 for ( ; ; ) { 537 n = remline(cp = buf, sizeof(buf), FALSE); 538 if (n <= 0) { 539 error("cmdspecial: premature end of input."); 540 return; 541 } 542 543 switch (*cp++) { 544 case RC_FILE: 545 if (env == NULL) { 546 len = (2 * sizeof(E_FILES)) + strlen(cp) + 10; 547 env = (char *) xmalloc(len); 548 (void) snprintf(env, len, "export %s;%s=%s", 549 E_FILES, E_FILES, cp); 550 } else { 551 len = strlen(env) + 1 + strlen(cp) + 1; 552 env = (char *) xrealloc(env, len); 553 (void) strlcat(env, ":", len); 554 (void) strlcat(env, cp, len); 555 } 556 ack(); 557 break; 558 559 case RC_COMMAND: 560 if (env) { 561 len = strlen(env) + 1 + strlen(cp) + 1; 562 env = (char *) xrealloc(env, len); 563 (void) strlcat(env, ";", len); 564 (void) strlcat(env, cp, len); 565 cmd = env; 566 } else 567 cmd = cp; 568 569 dospecial(cmd); 570 if (env) 571 (void) free(env); 572 return; 573 574 default: 575 error("Unknown cmdspecial command '%s'.", cp); 576 return; 577 } 578 } 579 } 580 581 /* 582 * Query. Check to see if file exists. Return one of the following: 583 * 584 #ifdef NFS_CHECK 585 * QC_ONNFS - resides on a NFS 586 #endif NFS_CHECK 587 #ifdef RO_CHECK 588 * QC_ONRO - resides on a Read-Only filesystem 589 #endif RO_CHECK 590 * QC_NO - doesn't exist 591 * QC_YESsize mtime - exists and its a regular file (size & mtime of file) 592 * QC_YES - exists and its a directory or symbolic link 593 * QC_ERRMSGmessage - error message 594 */ 595 static void 596 query(char *xname) 597 { 598 static struct stat stb; 599 int s = -1, stbvalid = 0; 600 char name[MAXPATHLEN]; 601 602 if (DECODE(name, xname) == -1) { 603 error("query: Cannot decode filename"); 604 return; 605 } 606 607 if (catname && cattarget(name) < 0) 608 return; 609 610 #if defined(NFS_CHECK) 611 if (IS_ON(options, DO_CHKNFS)) { 612 s = is_nfs_mounted(target, &stb, &stbvalid); 613 if (s > 0) 614 (void) sendcmd(QC_ONNFS, NULL); 615 616 /* Either the above check was true or an error occurred */ 617 /* and is_nfs_mounted sent the error message */ 618 if (s != 0) { 619 *ptarget = CNULL; 620 return; 621 } 622 } 623 #endif /* NFS_CHECK */ 624 625 #if defined(RO_CHECK) 626 if (IS_ON(options, DO_CHKREADONLY)) { 627 s = is_ro_mounted(target, &stb, &stbvalid); 628 if (s > 0) 629 (void) sendcmd(QC_ONRO, NULL); 630 631 /* Either the above check was true or an error occurred */ 632 /* and is_ro_mounted sent the error message */ 633 if (s != 0) { 634 *ptarget = CNULL; 635 return; 636 } 637 } 638 #endif /* RO_CHECK */ 639 640 if (IS_ON(options, DO_CHKSYM)) { 641 if (is_symlinked(target, &stb, &stbvalid) > 0) { 642 (void) sendcmd(QC_SYM, NULL); 643 return; 644 } 645 } 646 647 /* 648 * If stbvalid is false, "stb" is not valid because: 649 * a) RO_CHECK and NFS_CHECK were not defined 650 * b) The stat by is_*_mounted() either failed or 651 * does not match "target". 652 */ 653 if (!stbvalid && lstat(target, &stb) < 0) { 654 if (errno == ENOENT) 655 (void) sendcmd(QC_NO, NULL); 656 else 657 error("%s: lstat failed: %s", target, SYSERR); 658 *ptarget = CNULL; 659 return; 660 } 661 662 switch (stb.st_mode & S_IFMT) { 663 case S_IFLNK: 664 case S_IFDIR: 665 case S_IFREG: 666 #ifdef notyet 667 case S_IFCHR: 668 case S_IFBLK: 669 #ifdef S_IFSOCK 670 case S_IFSOCK: 671 #endif 672 #ifdef S_IFIFO 673 case S_IFIFO: 674 #endif 675 #endif 676 (void) sendcmd(QC_YES, "%ld %ld %o %s %s", 677 (long) stb.st_size, stb.st_mtime, 678 stb.st_mode & 07777, 679 getusername(stb.st_uid, target, options), 680 getgroupname(stb.st_gid, target, options)); 681 break; 682 683 default: 684 error("%s: not a file or directory", target); 685 break; 686 } 687 *ptarget = CNULL; 688 } 689 690 /* 691 * Check to see if parent directory exists and create one if not. 692 */ 693 static int 694 chkparent(char *name, opt_t opts) 695 { 696 char *cp; 697 struct stat stb; 698 int r = -1; 699 700 debugmsg(DM_CALL, "chkparent(%s, %o) start\n", name, opts); 701 702 cp = strrchr(name, '/'); 703 if (cp == NULL || cp == name) 704 return(0); 705 706 *cp = CNULL; 707 708 if (lstat(name, &stb) < 0) { 709 if (errno == ENOENT && chkparent(name, opts) >= 0) { 710 if (mkdir(name, 0777 & ~oumask) == 0) { 711 message(MT_NOTICE, "%s: mkdir", name); 712 r = 0; 713 } else 714 debugmsg(DM_MISC, 715 "chkparent(%s, %o) mkdir fail: %s\n", 716 name, opts, SYSERR); 717 } 718 } else /* It exists */ 719 r = 0; 720 721 /* Put back what we took away */ 722 *cp = '/'; 723 724 return(r); 725 } 726 727 /* 728 * Save a copy of 'file' by renaming it. 729 */ 730 static char * 731 savetarget(char *file, opt_t opts) 732 { 733 static char savefile[MAXPATHLEN]; 734 735 if (strlen(file) + sizeof(SAVE_SUFFIX) + 1 > MAXPATHLEN) { 736 error("%s: Cannot save: Save name too long", file); 737 return(NULL); 738 } 739 740 if (IS_ON(opts, DO_HISTORY)) { 741 int i; 742 struct stat st; 743 /* 744 * There is a race here, but the worst that can happen 745 * is to lose a version of the file 746 */ 747 for (i = 1; i < 1000; i++) { 748 (void) snprintf(savefile, sizeof(savefile), 749 "%s;%.3d", file, i); 750 if (stat(savefile, &st) == -1 && errno == ENOENT) 751 break; 752 753 } 754 if (i == 1000) { 755 message(MT_NOTICE, 756 "%s: More than 1000 versions for %s; reusing 1\n", 757 savefile, SYSERR); 758 i = 1; 759 (void) snprintf(savefile, sizeof(savefile), 760 "%s;%.3d", file, i); 761 } 762 } 763 else { 764 (void) snprintf(savefile, sizeof(savefile), "%s%s", 765 file, SAVE_SUFFIX); 766 767 if (unlink(savefile) != 0 && errno != ENOENT) { 768 message(MT_NOTICE, "%s: remove failed: %s", 769 savefile, SYSERR); 770 return(NULL); 771 } 772 } 773 774 if (rename(file, savefile) != 0 && errno != ENOENT) { 775 error("%s -> %s: rename failed: %s", 776 file, savefile, SYSERR); 777 return(NULL); 778 } 779 780 return(savefile); 781 } 782 783 /* 784 * Receive a file 785 */ 786 static void 787 recvfile(char *new, opt_t opts, int mode, char *owner, char *group, 788 time_t mtime, time_t atime, off_t size) 789 { 790 int f, wrerr, olderrno; 791 off_t i; 792 char *cp; 793 char *savefile = NULL; 794 static struct stat statbuff; 795 796 /* 797 * Create temporary file 798 */ 799 if ((f = open(new, O_CREAT|O_EXCL|O_WRONLY, mode)) < 0) { 800 if (errno != ENOENT || chkparent(new, opts) < 0 || 801 (f = open(new, O_CREAT|O_EXCL|O_WRONLY, mode)) < 0) { 802 error("%s: create failed: %s", new, SYSERR); 803 (void) unlink(new); 804 return; 805 } 806 } 807 808 /* 809 * Receive the file itself 810 */ 811 ack(); 812 wrerr = 0; 813 olderrno = 0; 814 for (i = 0; i < size; i += BUFSIZ) { 815 int amt = BUFSIZ; 816 817 cp = buf; 818 if (i + amt > size) 819 amt = size - i; 820 do { 821 int j; 822 823 j = readrem(cp, amt); 824 if (j <= 0) { 825 (void) close(f); 826 (void) unlink(new); 827 fatalerr( 828 "Read error occurred while receiving file."); 829 finish(); 830 } 831 amt -= j; 832 cp += j; 833 } while (amt > 0); 834 amt = BUFSIZ; 835 if (i + amt > size) 836 amt = size - i; 837 if (wrerr == 0 && xwrite(f, buf, amt) != amt) { 838 olderrno = errno; 839 wrerr++; 840 } 841 } 842 843 if (response() < 0) { 844 (void) close(f); 845 (void) unlink(new); 846 return; 847 } 848 849 if (wrerr) { 850 error("%s: Write error: %s", new, strerror(olderrno)); 851 (void) close(f); 852 (void) unlink(new); 853 return; 854 } 855 856 /* 857 * Do file comparison if enabled 858 */ 859 if (IS_ON(opts, DO_COMPARE)) { 860 FILE *f1, *f2; 861 int c; 862 863 errno = 0; /* fopen is not a syscall */ 864 if ((f1 = fopen(target, "r")) == NULL) { 865 error("%s: open for read failed: %s", target, SYSERR); 866 (void) close(f); 867 (void) unlink(new); 868 return; 869 } 870 errno = 0; 871 if ((f2 = fopen(new, "r")) == NULL) { 872 error("%s: open for read failed: %s", new, SYSERR); 873 (void) fclose(f1); 874 (void) close(f); 875 (void) unlink(new); 876 return; 877 } 878 while ((c = getc(f1)) == getc(f2)) 879 if (c == EOF) { 880 debugmsg(DM_MISC, 881 "Files are the same '%s' '%s'.", 882 target, new); 883 (void) fclose(f1); 884 (void) fclose(f2); 885 (void) close(f); 886 (void) unlink(new); 887 /* 888 * This isn't an error per-se, but we 889 * need to indicate to the master that 890 * the file was not updated. 891 */ 892 error(""); 893 return; 894 } 895 debugmsg(DM_MISC, "Files are different '%s' '%s'.", 896 target, new); 897 (void) fclose(f1); 898 (void) fclose(f2); 899 if (IS_ON(opts, DO_VERIFY)) { 900 message(MT_REMOTE|MT_INFO, "%s: need to update", 901 target); 902 (void) close(f); 903 (void) unlink(new); 904 return; 905 } 906 } 907 908 /* 909 * Set owner, group, and file mode 910 */ 911 if (fchog(f, new, owner, group, mode) < 0) { 912 (void) close(f); 913 (void) unlink(new); 914 return; 915 } 916 (void) close(f); 917 918 /* 919 * Perform utimes() after file is closed to make 920 * certain OS's, such as NeXT 2.1, happy. 921 */ 922 if (setfiletime(new, time((time_t *) 0), mtime) < 0) 923 message(MT_NOTICE, "%s: utimes failed: %s", new, SYSERR); 924 925 /* 926 * Try to save target file from being over-written 927 */ 928 if (IS_ON(opts, DO_SAVETARGETS)) 929 if ((savefile = savetarget(target, opts)) == NULL) { 930 (void) unlink(new); 931 return; 932 } 933 934 /* 935 * If the target is a directory, we need to remove it first 936 * before we can rename the new file. 937 */ 938 if ((stat(target, &statbuff) == 0) && S_ISDIR(statbuff.st_mode)) { 939 char *saveptr = ptarget; 940 941 ptarget = &target[strlen(target)]; 942 removefile(&statbuff, 0); 943 ptarget = saveptr; 944 } 945 946 /* 947 * Install new (temporary) file as the actual target 948 */ 949 if (rename(new, target) < 0) { 950 static char fmt[] = "%s -> %s: rename failed: %s"; 951 struct stat stb; 952 /* 953 * If the rename failed due to "Text file busy", then 954 * try to rename the target file and retry the rename. 955 */ 956 switch (errno) { 957 case ETXTBSY: 958 /* Save the target */ 959 if ((savefile = savetarget(target, opts)) != NULL) { 960 /* Retry installing new file as target */ 961 if (rename(new, target) < 0) { 962 error(fmt, new, target, SYSERR); 963 /* Try to put back save file */ 964 if (rename(savefile, target) < 0) 965 error(fmt, 966 savefile, target, SYSERR); 967 (void) unlink(new); 968 } else 969 message(MT_NOTICE, "%s: renamed to %s", 970 target, savefile); 971 /* 972 * XXX: We should remove the savefile here. 973 * But we are nice to nfs clients and 974 * we keep it. 975 */ 976 } 977 break; 978 case EISDIR: 979 /* 980 * See if target is a directory and remove it if it is 981 */ 982 if (lstat(target, &stb) == 0) { 983 if (S_ISDIR(stb.st_mode)) { 984 char *optarget = ptarget; 985 for (ptarget = target; *ptarget; 986 ptarget++); 987 /* If we failed to remove, we'll catch 988 it later */ 989 (void) removefile(&stb, 1); 990 ptarget = optarget; 991 } 992 } 993 if (rename(new, target) >= 0) 994 break; 995 /*FALLTHROUGH*/ 996 997 default: 998 error(fmt, new, target, SYSERR); 999 (void) unlink(new); 1000 break; 1001 } 1002 } 1003 1004 if (IS_ON(opts, DO_COMPARE)) 1005 message(MT_REMOTE|MT_CHANGE, "%s: updated", target); 1006 else 1007 ack(); 1008 } 1009 1010 /* 1011 * Receive a directory 1012 */ 1013 static void 1014 recvdir(opt_t opts, int mode, char *owner, char *group) 1015 { 1016 static char lowner[100], lgroup[100]; 1017 char *cp; 1018 struct stat stb; 1019 int s; 1020 1021 s = lstat(target, &stb); 1022 if (s == 0) { 1023 /* 1024 * If target is not a directory, remove it 1025 */ 1026 if (!S_ISDIR(stb.st_mode)) { 1027 if (IS_ON(opts, DO_VERIFY)) 1028 message(MT_NOTICE, "%s: need to remove", 1029 target); 1030 else { 1031 if (unlink(target) < 0) { 1032 error("%s: remove failed: %s", 1033 target, SYSERR); 1034 return; 1035 } 1036 } 1037 s = -1; 1038 errno = ENOENT; 1039 } else { 1040 if (!IS_ON(opts, DO_NOCHKMODE) && 1041 (stb.st_mode & 07777) != mode) { 1042 if (IS_ON(opts, DO_VERIFY)) 1043 message(MT_NOTICE, 1044 "%s: need to chmod to %o", 1045 target, mode); 1046 else { 1047 if (chmod(target, mode) != 0) 1048 message(MT_NOTICE, 1049 "%s: chmod from %o to %o failed: %s", 1050 target, 1051 stb.st_mode & 07777, 1052 mode, 1053 SYSERR); 1054 else 1055 message(MT_NOTICE, 1056 "%s: chmod from %o to %o", 1057 target, 1058 stb.st_mode & 07777, 1059 mode); 1060 } 1061 } 1062 1063 /* 1064 * Check ownership and set if necessary 1065 */ 1066 lowner[0] = CNULL; 1067 lgroup[0] = CNULL; 1068 1069 if (!IS_ON(opts, DO_NOCHKOWNER) && owner) { 1070 int o; 1071 1072 o = (owner[0] == ':') ? opts & DO_NUMCHKOWNER : 1073 opts; 1074 if ((cp = getusername(stb.st_uid, target, o)) 1075 != NULL) 1076 if (strcmp(owner, cp)) 1077 (void) strlcpy(lowner, cp, 1078 sizeof(lowner)); 1079 } 1080 if (!IS_ON(opts, DO_NOCHKGROUP) && group) { 1081 int o; 1082 1083 o = (group[0] == ':') ? opts & DO_NUMCHKGROUP : 1084 opts; 1085 if ((cp = getgroupname(stb.st_gid, target, o)) 1086 != NULL) 1087 if (strcmp(group, cp)) 1088 (void) strlcpy(lgroup, cp, 1089 sizeof(lgroup)); 1090 } 1091 1092 /* 1093 * Need to set owner and/or group 1094 */ 1095 #define PRN(n) ((n[0] == ':') ? n+1 : n) 1096 if (lowner[0] != CNULL || lgroup[0] != CNULL) { 1097 if (lowner[0] == CNULL && 1098 (cp = getusername(stb.st_uid, 1099 target, opts))) 1100 (void) strlcpy(lowner, cp, 1101 sizeof(lowner)); 1102 if (lgroup[0] == CNULL && 1103 (cp = getgroupname(stb.st_gid, 1104 target, opts))) 1105 (void) strlcpy(lgroup, cp, 1106 sizeof(lgroup)); 1107 1108 if (IS_ON(opts, DO_VERIFY)) 1109 message(MT_NOTICE, 1110 "%s: need to chown from %s:%s to %s:%s", 1111 target, 1112 PRN(lowner), PRN(lgroup), 1113 PRN(owner), PRN(group)); 1114 else { 1115 if (fchog(-1, target, owner, 1116 group, -1) == 0) 1117 message(MT_NOTICE, 1118 "%s: chown from %s:%s to %s:%s", 1119 target, 1120 PRN(lowner), 1121 PRN(lgroup), 1122 PRN(owner), 1123 PRN(group)); 1124 } 1125 } 1126 #undef PRN 1127 ack(); 1128 return; 1129 } 1130 } 1131 1132 if (IS_ON(opts, DO_VERIFY)) { 1133 ack(); 1134 return; 1135 } 1136 1137 /* 1138 * Create the directory 1139 */ 1140 if (s < 0) { 1141 if (errno == ENOENT) { 1142 if (mkdir(target, mode) == 0 || 1143 (chkparent(target, opts) == 0 && 1144 mkdir(target, mode) == 0)) { 1145 message(MT_NOTICE, "%s: mkdir", target); 1146 (void) fchog(-1, target, owner, group, mode); 1147 ack(); 1148 } else { 1149 error("%s: mkdir failed: %s", target, SYSERR); 1150 ptarget = sptarget[--catname]; 1151 *ptarget = CNULL; 1152 } 1153 return; 1154 } 1155 } 1156 error("%s: lstat failed: %s", target, SYSERR); 1157 ptarget = sptarget[--catname]; 1158 *ptarget = CNULL; 1159 } 1160 1161 /* 1162 * Receive a link 1163 */ 1164 static void 1165 recvlink(char *new, opt_t opts, int mode, off_t size) 1166 { 1167 char tbuf[MAXPATHLEN]; 1168 struct stat stb; 1169 char *optarget; 1170 int uptodate; 1171 off_t i; 1172 1173 /* 1174 * Read basic link info 1175 */ 1176 ack(); 1177 (void) remline(buf, sizeof(buf), TRUE); 1178 1179 if (response() < 0) { 1180 err(); 1181 return; 1182 } 1183 1184 uptodate = 0; 1185 if ((i = readlink(target, tbuf, sizeof(tbuf)-1)) != -1) { 1186 tbuf[i] = '\0'; 1187 if (i == size && strncmp(buf, tbuf, (int) size) == 0) 1188 uptodate = 1; 1189 } 1190 mode &= 0777; 1191 1192 if (IS_ON(opts, DO_VERIFY) || uptodate) { 1193 if (uptodate) 1194 message(MT_REMOTE|MT_INFO, ""); 1195 else 1196 message(MT_REMOTE|MT_INFO, "%s: need to update", 1197 target); 1198 if (IS_ON(opts, DO_COMPARE)) 1199 return; 1200 (void) sendcmd(C_END, NULL); 1201 (void) response(); 1202 return; 1203 } 1204 1205 /* 1206 * Make new symlink using a temporary name 1207 */ 1208 if (symlink(buf, new) < 0) { 1209 if (errno != ENOENT || chkparent(new, opts) < 0 || 1210 symlink(buf, new) < 0) { 1211 error("%s -> %s: symlink failed: %s", new, buf,SYSERR); 1212 (void) unlink(new); 1213 return; 1214 } 1215 } 1216 1217 /* 1218 * See if target is a directory and remove it if it is 1219 */ 1220 if (lstat(target, &stb) == 0) { 1221 if (S_ISDIR(stb.st_mode)) { 1222 optarget = ptarget; 1223 for (ptarget = target; *ptarget; ptarget++); 1224 if (removefile(&stb, 0) < 0) { 1225 ptarget = optarget; 1226 (void) unlink(new); 1227 (void) sendcmd(C_END, NULL); 1228 (void) response(); 1229 return; 1230 } 1231 ptarget = optarget; 1232 } 1233 } 1234 1235 /* 1236 * Install link as the target 1237 */ 1238 if (rename(new, target) < 0) { 1239 error("%s -> %s: symlink rename failed: %s", 1240 new, target, SYSERR); 1241 (void) unlink(new); 1242 (void) sendcmd(C_END, NULL); 1243 (void) response(); 1244 return; 1245 } 1246 1247 message(MT_REMOTE|MT_CHANGE, "%s: updated", target); 1248 1249 /* 1250 * Indicate end of receive operation 1251 */ 1252 (void) sendcmd(C_END, NULL); 1253 (void) response(); 1254 } 1255 1256 /* 1257 * Creat a hard link to existing file. 1258 */ 1259 static void 1260 hardlink(char *cmd) 1261 { 1262 struct stat stb; 1263 int exists = 0; 1264 char *xoldname, *xnewname; 1265 char *cp = cmd; 1266 static char expbuf[BUFSIZ]; 1267 char oldname[BUFSIZ], newname[BUFSIZ]; 1268 1269 /* Skip over opts */ 1270 (void) strtol(cp, &cp, 8); 1271 if (*cp++ != ' ') { 1272 error("hardlink: options not delimited"); 1273 return; 1274 } 1275 1276 xoldname = strtok(cp, " "); 1277 if (xoldname == NULL) { 1278 error("hardlink: oldname name not delimited"); 1279 return; 1280 } 1281 1282 if (DECODE(oldname, xoldname) == -1) { 1283 error("hardlink: Cannot decode oldname"); 1284 return; 1285 } 1286 1287 xnewname = strtok(NULL, " "); 1288 if (xnewname == NULL) { 1289 error("hardlink: new name not specified"); 1290 return; 1291 } 1292 1293 if (DECODE(newname, xnewname) == -1) { 1294 error("hardlink: Cannot decode newname"); 1295 return; 1296 } 1297 1298 if (exptilde(expbuf, oldname, sizeof(expbuf)) == NULL) { 1299 error("hardlink: tilde expansion failed"); 1300 return; 1301 } 1302 1303 if (catname && cattarget(newname) < 0) { 1304 error("Cannot set newname target."); 1305 return; 1306 } 1307 1308 if (lstat(target, &stb) == 0) { 1309 int mode = stb.st_mode & S_IFMT; 1310 1311 if (mode != S_IFREG && mode != S_IFLNK) { 1312 error("%s: not a regular file", target); 1313 return; 1314 } 1315 exists = 1; 1316 } 1317 1318 if (chkparent(target, options) < 0 ) { 1319 error("%s: no parent: %s ", target, SYSERR); 1320 return; 1321 } 1322 if (exists && (unlink(target) < 0)) { 1323 error("%s: unlink failed: %s", target, SYSERR); 1324 return; 1325 } 1326 if (link(expbuf, target) < 0) { 1327 error("%s: cannot link to %s: %s", target, oldname, SYSERR); 1328 return; 1329 } 1330 ack(); 1331 } 1332 1333 /* 1334 * Set configuration information. 1335 * 1336 * A key letter is followed immediately by the value 1337 * to set. The keys are: 1338 * SC_FREESPACE - Set minimium free space of filesystem 1339 * SC_FREEFILES - Set minimium free number of files of filesystem 1340 */ 1341 static void 1342 setconfig(char *cmd) 1343 { 1344 char *cp = cmd; 1345 char *estr; 1346 1347 switch (*cp++) { 1348 case SC_HOSTNAME: /* Set hostname */ 1349 /* 1350 * Only use info if we don't know who this is. 1351 */ 1352 if (!fromhost) { 1353 fromhost = xstrdup(cp); 1354 message(MT_SYSLOG, "startup for %s", fromhost); 1355 #if defined(SETARGS) || defined(HAVE_SETPROCTITLE) 1356 setproctitle("serving %s", cp); 1357 #endif /* SETARGS || HAVE_SETPROCTITLE */ 1358 } 1359 break; 1360 1361 case SC_FREESPACE: /* Minimium free space */ 1362 if (!isdigit((unsigned char)*cp)) { 1363 fatalerr("Expected digit, got '%s'.", cp); 1364 return; 1365 } 1366 min_freespace = (unsigned long) atoi(cp); 1367 break; 1368 1369 case SC_FREEFILES: /* Minimium free files */ 1370 if (!isdigit((unsigned char)*cp)) { 1371 fatalerr("Expected digit, got '%s'.", cp); 1372 return; 1373 } 1374 min_freefiles = (unsigned long) atoi(cp); 1375 break; 1376 1377 case SC_LOGGING: /* Logging options */ 1378 if ((estr = msgparseopts(cp, TRUE)) != NULL) { 1379 fatalerr("Bad message option string (%s): %s", 1380 cp, estr); 1381 return; 1382 } 1383 break; 1384 1385 case SC_DEFOWNER: 1386 (void) strlcpy(defowner, cp, sizeof(defowner)); 1387 break; 1388 1389 case SC_DEFGROUP: 1390 (void) strlcpy(defgroup, cp, sizeof(defgroup)); 1391 break; 1392 1393 default: 1394 message(MT_NOTICE, "Unknown config command \"%s\".", cp-1); 1395 return; 1396 } 1397 } 1398 1399 /* 1400 * Receive something 1401 */ 1402 static void 1403 recvit(char *cmd, int type) 1404 { 1405 int mode; 1406 opt_t opts; 1407 off_t size; 1408 time_t mtime, atime; 1409 char *owner, *group, *file; 1410 char new[MAXPATHLEN]; 1411 char fileb[MAXPATHLEN]; 1412 long freespace = -1, freefiles = -1; 1413 char *cp = cmd; 1414 1415 /* 1416 * Get rdist option flags 1417 */ 1418 opts = strtol(cp, &cp, 8); 1419 if (*cp++ != ' ') { 1420 error("recvit: options not delimited"); 1421 return; 1422 } 1423 1424 /* 1425 * Get file mode 1426 */ 1427 mode = strtol(cp, &cp, 8); 1428 if (*cp++ != ' ') { 1429 error("recvit: mode not delimited"); 1430 return; 1431 } 1432 1433 /* 1434 * Get file size 1435 */ 1436 size = strtol(cp, &cp, 10); 1437 if (*cp++ != ' ') { 1438 error("recvit: size not delimited"); 1439 return; 1440 } 1441 1442 /* 1443 * Get modification time 1444 */ 1445 mtime = strtol(cp, &cp, 10); 1446 if (*cp++ != ' ') { 1447 error("recvit: mtime not delimited"); 1448 return; 1449 } 1450 1451 /* 1452 * Get access time 1453 */ 1454 atime = strtol(cp, &cp, 10); 1455 if (*cp++ != ' ') { 1456 error("recvit: atime not delimited"); 1457 return; 1458 } 1459 1460 /* 1461 * Get file owner name 1462 */ 1463 owner = strtok(cp, " "); 1464 if (owner == NULL) { 1465 error("recvit: owner name not delimited"); 1466 return; 1467 } 1468 1469 /* 1470 * Get file group name 1471 */ 1472 group = strtok(NULL, " "); 1473 if (group == NULL) { 1474 error("recvit: group name not delimited"); 1475 return; 1476 } 1477 1478 /* 1479 * Get file name. Can't use strtok() since there could 1480 * be white space in the file name. 1481 */ 1482 if (DECODE(fileb, group + strlen(group) + 1) == -1) { 1483 error("recvit: Cannot decode file name"); 1484 return; 1485 } 1486 1487 if (fileb[0] == '\0') { 1488 error("recvit: no file name"); 1489 return; 1490 } 1491 file = fileb; 1492 1493 debugmsg(DM_MISC, 1494 "recvit: opts = %04o mode = %04o size = %d mtime = %d", 1495 opts, mode, size, mtime); 1496 debugmsg(DM_MISC, 1497 "recvit: owner = '%s' group = '%s' file = '%s' catname = %d isdir = %d", 1498 owner, group, file, catname, (type == S_IFDIR) ? 1 : 0); 1499 1500 if (type == S_IFDIR) { 1501 if ((size_t) catname >= sizeof(sptarget)) { 1502 error("%s: too many directory levels", target); 1503 return; 1504 } 1505 sptarget[catname] = ptarget; 1506 if (catname++) { 1507 *ptarget++ = '/'; 1508 while ((*ptarget++ = *file++) != '\0') 1509 continue; 1510 ptarget--; 1511 } 1512 } else { 1513 /* 1514 * Create name of temporary file 1515 */ 1516 if (catname && cattarget(file) < 0) { 1517 error("Cannot set file name."); 1518 return; 1519 } 1520 file = strrchr(target, '/'); 1521 if (file == NULL) 1522 (void) strlcpy(new, tempname, sizeof(new)); 1523 else if (file == target) 1524 (void) snprintf(new, sizeof(new), "/%s", tempname); 1525 else { 1526 *file = CNULL; 1527 (void) snprintf(new, sizeof(new), "%s/%s", target, 1528 tempname); 1529 *file = '/'; 1530 } 1531 (void) mktemp(new); 1532 } 1533 1534 /* 1535 * Check to see if there is enough free space and inodes 1536 * to install this file. 1537 */ 1538 if (min_freespace || min_freefiles) { 1539 /* Convert file size to kilobytes */ 1540 long fsize = (long) (size / 1024); 1541 1542 if (getfilesysinfo(target, &freespace, &freefiles) != 0) 1543 return; 1544 1545 /* 1546 * filesystem values < 0 indicate unsupported or unavailable 1547 * information. 1548 */ 1549 if (min_freespace && (freespace >= 0) && 1550 (freespace - fsize < min_freespace)) { 1551 error( 1552 "%s: Not enough free space on filesystem: min %d free %d", 1553 target, min_freespace, freespace); 1554 return; 1555 } 1556 if (min_freefiles && (freefiles >= 0) && 1557 (freefiles - 1 < min_freefiles)) { 1558 error( 1559 "%s: Not enough free files on filesystem: min %d free %d", 1560 target, min_freefiles, freefiles); 1561 return; 1562 } 1563 } 1564 1565 /* 1566 * Call appropriate receive function to receive file 1567 */ 1568 switch (type) { 1569 case S_IFDIR: 1570 recvdir(opts, mode, owner, group); 1571 break; 1572 1573 case S_IFLNK: 1574 recvlink(new, opts, mode, size); 1575 break; 1576 1577 case S_IFREG: 1578 recvfile(new, opts, mode, owner, group, mtime, atime, size); 1579 break; 1580 1581 default: 1582 error("%d: unknown file type", type); 1583 break; 1584 } 1585 } 1586 1587 /* 1588 * Chmog something 1589 */ 1590 static void 1591 dochmog(char *cmd) 1592 { 1593 int mode; 1594 opt_t opts; 1595 char *owner, *group, *file; 1596 char *cp = cmd; 1597 char fileb[MAXPATHLEN]; 1598 1599 /* 1600 * Get rdist option flags 1601 */ 1602 opts = strtol(cp, &cp, 8); 1603 if (*cp++ != ' ') { 1604 error("dochmog: options not delimited"); 1605 return; 1606 } 1607 1608 /* 1609 * Get file mode 1610 */ 1611 mode = strtol(cp, &cp, 8); 1612 if (*cp++ != ' ') { 1613 error("dochmog: mode not delimited"); 1614 return; 1615 } 1616 1617 /* 1618 * Get file owner name 1619 */ 1620 owner = strtok(cp, " "); 1621 if (owner == NULL) { 1622 error("dochmog: owner name not delimited"); 1623 return; 1624 } 1625 1626 /* 1627 * Get file group name 1628 */ 1629 group = strtok(NULL, " "); 1630 if (group == NULL) { 1631 error("dochmog: group name not delimited"); 1632 return; 1633 } 1634 1635 /* 1636 * Get file name. Can't use strtok() since there could 1637 * be white space in the file name. 1638 */ 1639 if (DECODE(fileb, group + strlen(group) + 1) == -1) { 1640 error("dochmog: Cannot decode file name"); 1641 return; 1642 } 1643 1644 if (fileb[0] == '\0') { 1645 error("dochmog: no file name"); 1646 return; 1647 } 1648 file = fileb; 1649 1650 debugmsg(DM_MISC, 1651 "dochmog: opts = %04o mode = %04o", opts, mode); 1652 debugmsg(DM_MISC, 1653 "dochmog: owner = '%s' group = '%s' file = '%s' catname = %d", 1654 owner, group, file, catname); 1655 1656 if (catname && cattarget(file) < 0) { 1657 error("Cannot set newname target."); 1658 return; 1659 } 1660 1661 (void) fchog(-1, target, owner, group, mode); 1662 1663 ack(); 1664 } 1665 1666 /* 1667 * Set target information 1668 */ 1669 static void 1670 settarget(char *cmd, int isdir) 1671 { 1672 char *cp = cmd; 1673 opt_t opts; 1674 char file[BUFSIZ]; 1675 1676 catname = isdir; 1677 1678 /* 1679 * Parse options for this target 1680 */ 1681 opts = strtol(cp, &cp, 8); 1682 if (*cp++ != ' ') { 1683 error("settarget: options not delimited"); 1684 return; 1685 } 1686 options = opts; 1687 1688 if (DECODE(file, cp) == -1) { 1689 error("settarget: Cannot decode target name"); 1690 return; 1691 } 1692 1693 /* 1694 * Handle target 1695 */ 1696 if (exptilde(target, cp, sizeof(target)) == NULL) 1697 return; 1698 ptarget = target; 1699 while (*ptarget) 1700 ptarget++; 1701 1702 ack(); 1703 } 1704 1705 /* 1706 * Cleanup in preparation for exiting. 1707 */ 1708 void 1709 cleanup(int dummy) 1710 { 1711 /* We don't need to do anything */ 1712 } 1713 1714 /* 1715 * Server routine to read requests and process them. 1716 */ 1717 void 1718 server(void) 1719 { 1720 static char cmdbuf[BUFSIZ]; 1721 char *cp; 1722 int n; 1723 extern jmp_buf finish_jmpbuf; 1724 1725 if (setjmp(finish_jmpbuf)) 1726 return; 1727 (void) signal(SIGHUP, sighandler); 1728 (void) signal(SIGINT, sighandler); 1729 (void) signal(SIGQUIT, sighandler); 1730 (void) signal(SIGTERM, sighandler); 1731 (void) signal(SIGPIPE, sighandler); 1732 (void) umask(oumask = umask(0)); 1733 (void) strlcpy(tempname, _RDIST_TMP, sizeof(tempname)); 1734 if (fromhost) { 1735 message(MT_SYSLOG, "Startup for %s", fromhost); 1736 #if defined(SETARGS) 1737 setproctitle("Serving %s", fromhost); 1738 #endif /* SETARGS */ 1739 } 1740 1741 /* 1742 * Let client know we want it to send it's version number 1743 */ 1744 (void) sendcmd(S_VERSION, NULL); 1745 1746 if (remline(cmdbuf, sizeof(cmdbuf), TRUE) < 0) { 1747 error("server: expected control record"); 1748 return; 1749 } 1750 1751 if (cmdbuf[0] != S_VERSION || !isdigit((unsigned char)cmdbuf[1])) { 1752 error("Expected version command, received: \"%s\".", cmdbuf); 1753 return; 1754 } 1755 1756 proto_version = atoi(&cmdbuf[1]); 1757 if (proto_version != VERSION) { 1758 error("Protocol version %d is not supported.", proto_version); 1759 return; 1760 } 1761 1762 /* Version number is okay */ 1763 ack(); 1764 1765 /* 1766 * Main command loop 1767 */ 1768 for ( ; ; ) { 1769 n = remline(cp = cmdbuf, sizeof(cmdbuf), TRUE); 1770 if (n == -1) /* EOF */ 1771 return; 1772 if (n == 0) { 1773 error("server: expected control record"); 1774 continue; 1775 } 1776 1777 switch (*cp++) { 1778 case C_SETCONFIG: /* Configuration info */ 1779 setconfig(cp); 1780 ack(); 1781 continue; 1782 1783 case C_DIRTARGET: /* init target file/directory name */ 1784 settarget(cp, TRUE); 1785 continue; 1786 1787 case C_TARGET: /* init target file/directory name */ 1788 settarget(cp, FALSE); 1789 continue; 1790 1791 case C_RECVREG: /* Transfer a regular file. */ 1792 recvit(cp, S_IFREG); 1793 continue; 1794 1795 case C_RECVDIR: /* Transfer a directory. */ 1796 recvit(cp, S_IFDIR); 1797 continue; 1798 1799 case C_RECVSYMLINK: /* Transfer symbolic link. */ 1800 recvit(cp, S_IFLNK); 1801 continue; 1802 1803 case C_RECVHARDLINK: /* Transfer hard link. */ 1804 hardlink(cp); 1805 continue; 1806 1807 case C_END: /* End of transfer */ 1808 *ptarget = CNULL; 1809 if (catname <= 0) { 1810 error("server: too many '%c's", C_END); 1811 continue; 1812 } 1813 ptarget = sptarget[--catname]; 1814 *ptarget = CNULL; 1815 ack(); 1816 continue; 1817 1818 case C_CLEAN: /* Clean. Cleanup a directory */ 1819 clean(cp); 1820 continue; 1821 1822 case C_QUERY: /* Query file/directory */ 1823 query(cp); 1824 continue; 1825 1826 case C_SPECIAL: /* Special. Execute commands */ 1827 dospecial(cp); 1828 continue; 1829 1830 case C_CMDSPECIAL: /* Cmd Special. Execute commands */ 1831 docmdspecial(); 1832 continue; 1833 1834 case C_CHMOG: /* Set owner, group, mode */ 1835 dochmog(cp); 1836 continue; 1837 1838 case C_ERRMSG: /* Normal error message */ 1839 if (cp && *cp) 1840 message(MT_NERROR|MT_NOREMOTE, "%s", cp); 1841 continue; 1842 1843 case C_FERRMSG: /* Fatal error message */ 1844 if (cp && *cp) 1845 message(MT_FERROR|MT_NOREMOTE, "%s", cp); 1846 return; 1847 1848 default: 1849 error("server: unknown command '%s'", cp - 1); 1850 case CNULL: 1851 continue; 1852 } 1853 } 1854 } 1855