1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)readcf.c 8.25 (Berkeley) 07/02/94"; 11 #endif /* not lint */ 12 13 # include "sendmail.h" 14 # include <pwd.h> 15 # include <grp.h> 16 #if NAMED_BIND 17 # include <resolv.h> 18 #endif 19 20 /* 21 ** READCF -- read control file. 22 ** 23 ** This routine reads the control file and builds the internal 24 ** form. 25 ** 26 ** The file is formatted as a sequence of lines, each taken 27 ** atomically. The first character of each line describes how 28 ** the line is to be interpreted. The lines are: 29 ** Dxval Define macro x to have value val. 30 ** Cxword Put word into class x. 31 ** Fxfile [fmt] Read file for lines to put into 32 ** class x. Use scanf string 'fmt' 33 ** or "%s" if not present. Fmt should 34 ** only produce one string-valued result. 35 ** Hname: value Define header with field-name 'name' 36 ** and value as specified; this will be 37 ** macro expanded immediately before 38 ** use. 39 ** Sn Use rewriting set n. 40 ** Rlhs rhs Rewrite addresses that match lhs to 41 ** be rhs. 42 ** Mn arg=val... Define mailer. n is the internal name. 43 ** Args specify mailer parameters. 44 ** Oxvalue Set option x to value. 45 ** Pname=value Set precedence name to value. 46 ** Vversioncode[/vendorcode] 47 ** Version level/vendor name of 48 ** configuration syntax. 49 ** Kmapname mapclass arguments.... 50 ** Define keyed lookup of a given class. 51 ** Arguments are class dependent. 52 ** 53 ** Parameters: 54 ** cfname -- control file name. 55 ** safe -- TRUE if this is the system config file; 56 ** FALSE otherwise. 57 ** e -- the main envelope. 58 ** 59 ** Returns: 60 ** none. 61 ** 62 ** Side Effects: 63 ** Builds several internal tables. 64 */ 65 66 readcf(cfname, safe, e) 67 char *cfname; 68 bool safe; 69 register ENVELOPE *e; 70 { 71 FILE *cf; 72 int ruleset = 0; 73 char *q; 74 struct rewrite *rwp = NULL; 75 char *bp; 76 auto char *ep; 77 int nfuzzy; 78 char *file; 79 bool optional; 80 char buf[MAXLINE]; 81 register char *p; 82 extern char **copyplist(); 83 struct stat statb; 84 char exbuf[MAXLINE]; 85 char pvpbuf[MAXLINE + MAXATOM]; 86 extern char *munchstring(); 87 extern void makemapentry(); 88 89 FileName = cfname; 90 LineNumber = 0; 91 92 cf = fopen(cfname, "r"); 93 if (cf == NULL) 94 { 95 syserr("cannot open"); 96 exit(EX_OSFILE); 97 } 98 99 if (fstat(fileno(cf), &statb) < 0) 100 { 101 syserr("cannot fstat"); 102 exit(EX_OSFILE); 103 } 104 105 if (!S_ISREG(statb.st_mode)) 106 { 107 syserr("not a plain file"); 108 exit(EX_OSFILE); 109 } 110 111 if (OpMode != MD_TEST && bitset(S_IWGRP|S_IWOTH, statb.st_mode)) 112 { 113 if (OpMode == MD_DAEMON || OpMode == MD_FREEZE) 114 fprintf(stderr, "%s: WARNING: dangerous write permissions\n", 115 FileName); 116 #ifdef LOG 117 if (LogLevel > 0) 118 syslog(LOG_CRIT, "%s: WARNING: dangerous write permissions", 119 FileName); 120 #endif 121 } 122 123 #ifdef XLA 124 xla_zero(); 125 #endif 126 127 while ((bp = fgetfolded(buf, sizeof buf, cf)) != NULL) 128 { 129 if (bp[0] == '#') 130 { 131 if (bp != buf) 132 free(bp); 133 continue; 134 } 135 136 /* map $ into \201 for macro expansion */ 137 for (p = bp; *p != '\0'; p++) 138 { 139 if (*p == '#' && p > bp && ConfigLevel >= 3) 140 { 141 /* this is an on-line comment */ 142 register char *e; 143 144 switch (*--p & 0377) 145 { 146 case MACROEXPAND: 147 /* it's from $# -- let it go through */ 148 p++; 149 break; 150 151 case '\\': 152 /* it's backslash escaped */ 153 (void) strcpy(p, p + 1); 154 break; 155 156 default: 157 /* delete preceeding white space */ 158 while (isascii(*p) && isspace(*p) && p > bp) 159 p--; 160 if ((e = strchr(++p, '\n')) != NULL) 161 (void) strcpy(p, e); 162 else 163 p[0] = p[1] = '\0'; 164 break; 165 } 166 continue; 167 } 168 169 if (*p != '$') 170 continue; 171 172 if (p[1] == '$') 173 { 174 /* actual dollar sign.... */ 175 (void) strcpy(p, p + 1); 176 continue; 177 } 178 179 /* convert to macro expansion character */ 180 *p = MACROEXPAND; 181 } 182 183 /* interpret this line */ 184 errno = 0; 185 switch (bp[0]) 186 { 187 case '\0': 188 case '#': /* comment */ 189 break; 190 191 case 'R': /* rewriting rule */ 192 for (p = &bp[1]; *p != '\0' && *p != '\t'; p++) 193 continue; 194 195 if (*p == '\0') 196 { 197 syserr("invalid rewrite line \"%s\" (tab expected)", bp); 198 break; 199 } 200 201 /* allocate space for the rule header */ 202 if (rwp == NULL) 203 { 204 RewriteRules[ruleset] = rwp = 205 (struct rewrite *) xalloc(sizeof *rwp); 206 } 207 else 208 { 209 rwp->r_next = (struct rewrite *) xalloc(sizeof *rwp); 210 rwp = rwp->r_next; 211 } 212 rwp->r_next = NULL; 213 214 /* expand and save the LHS */ 215 *p = '\0'; 216 expand(&bp[1], exbuf, &exbuf[sizeof exbuf], e); 217 rwp->r_lhs = prescan(exbuf, '\t', pvpbuf, 218 sizeof pvpbuf, NULL); 219 nfuzzy = 0; 220 if (rwp->r_lhs != NULL) 221 { 222 register char **ap; 223 224 rwp->r_lhs = copyplist(rwp->r_lhs, TRUE); 225 226 /* count the number of fuzzy matches in LHS */ 227 for (ap = rwp->r_lhs; *ap != NULL; ap++) 228 { 229 char *botch; 230 231 botch = NULL; 232 switch (**ap & 0377) 233 { 234 case MATCHZANY: 235 case MATCHANY: 236 case MATCHONE: 237 case MATCHCLASS: 238 case MATCHNCLASS: 239 nfuzzy++; 240 break; 241 242 case MATCHREPL: 243 botch = "$0-$9"; 244 break; 245 246 case CANONNET: 247 botch = "$#"; 248 break; 249 250 case CANONUSER: 251 botch = "$:"; 252 break; 253 254 case CALLSUBR: 255 botch = "$>"; 256 break; 257 258 case CONDIF: 259 botch = "$?"; 260 break; 261 262 case CONDELSE: 263 botch = "$|"; 264 break; 265 266 case CONDFI: 267 botch = "$."; 268 break; 269 270 case HOSTBEGIN: 271 botch = "$["; 272 break; 273 274 case HOSTEND: 275 botch = "$]"; 276 break; 277 278 case LOOKUPBEGIN: 279 botch = "$("; 280 break; 281 282 case LOOKUPEND: 283 botch = "$)"; 284 break; 285 } 286 if (botch != NULL) 287 syserr("Inappropriate use of %s on LHS", 288 botch); 289 } 290 } 291 else 292 syserr("R line: null LHS"); 293 294 /* expand and save the RHS */ 295 while (*++p == '\t') 296 continue; 297 q = p; 298 while (*p != '\0' && *p != '\t') 299 p++; 300 *p = '\0'; 301 expand(q, exbuf, &exbuf[sizeof exbuf], e); 302 rwp->r_rhs = prescan(exbuf, '\t', pvpbuf, 303 sizeof pvpbuf, NULL); 304 if (rwp->r_rhs != NULL) 305 { 306 register char **ap; 307 308 rwp->r_rhs = copyplist(rwp->r_rhs, TRUE); 309 310 /* check no out-of-bounds replacements */ 311 nfuzzy += '0'; 312 for (ap = rwp->r_rhs; *ap != NULL; ap++) 313 { 314 char *botch; 315 316 botch = NULL; 317 switch (**ap & 0377) 318 { 319 case MATCHREPL: 320 if ((*ap)[1] <= '0' || (*ap)[1] > nfuzzy) 321 { 322 syserr("replacement $%c out of bounds", 323 (*ap)[1]); 324 } 325 break; 326 327 case MATCHZANY: 328 botch = "$*"; 329 break; 330 331 case MATCHANY: 332 botch = "$+"; 333 break; 334 335 case MATCHONE: 336 botch = "$-"; 337 break; 338 339 case MATCHCLASS: 340 botch = "$="; 341 break; 342 343 case MATCHNCLASS: 344 botch = "$~"; 345 break; 346 } 347 if (botch != NULL) 348 syserr("Inappropriate use of %s on RHS", 349 botch); 350 } 351 } 352 else 353 syserr("R line: null RHS"); 354 break; 355 356 case 'S': /* select rewriting set */ 357 for (p = &bp[1]; isascii(*p) && isspace(*p); p++) 358 continue; 359 if (!isascii(*p) || !isdigit(*p)) 360 { 361 syserr("invalid argument to S line: \"%.20s\"", 362 &bp[1]); 363 break; 364 } 365 ruleset = atoi(p); 366 if (ruleset >= MAXRWSETS || ruleset < 0) 367 { 368 syserr("bad ruleset %d (%d max)", ruleset, MAXRWSETS); 369 ruleset = 0; 370 } 371 rwp = NULL; 372 break; 373 374 case 'D': /* macro definition */ 375 p = munchstring(&bp[2], NULL); 376 define(bp[1], newstr(p), e); 377 break; 378 379 case 'H': /* required header line */ 380 (void) chompheader(&bp[1], TRUE, e); 381 break; 382 383 case 'C': /* word class */ 384 /* scan the list of words and set class for all */ 385 expand(&bp[2], exbuf, &exbuf[sizeof exbuf], e); 386 for (p = exbuf; *p != '\0'; ) 387 { 388 register char *wd; 389 char delim; 390 391 while (*p != '\0' && isascii(*p) && isspace(*p)) 392 p++; 393 wd = p; 394 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 395 p++; 396 delim = *p; 397 *p = '\0'; 398 if (wd[0] != '\0') 399 setclass(bp[1], wd); 400 *p = delim; 401 } 402 break; 403 404 case 'F': /* word class from file */ 405 for (p = &bp[2]; isascii(*p) && isspace(*p); ) 406 p++; 407 if (p[0] == '-' && p[1] == 'o') 408 { 409 optional = TRUE; 410 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 411 p++; 412 while (isascii(*p) && isspace(*p)) 413 *p++; 414 } 415 else 416 optional = FALSE; 417 file = p; 418 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 419 p++; 420 if (*p == '\0') 421 p = "%s"; 422 else 423 { 424 *p = '\0'; 425 while (isascii(*++p) && isspace(*p)) 426 continue; 427 } 428 fileclass(bp[1], file, p, safe, optional); 429 break; 430 431 #ifdef XLA 432 case 'L': /* extended load average description */ 433 xla_init(&bp[1]); 434 break; 435 #endif 436 437 case 'M': /* define mailer */ 438 makemailer(&bp[1]); 439 break; 440 441 case 'O': /* set option */ 442 setoption(bp[1], &bp[2], safe, FALSE, e); 443 break; 444 445 case 'P': /* set precedence */ 446 if (NumPriorities >= MAXPRIORITIES) 447 { 448 toomany('P', MAXPRIORITIES); 449 break; 450 } 451 for (p = &bp[1]; *p != '\0' && *p != '=' && *p != '\t'; p++) 452 continue; 453 if (*p == '\0') 454 goto badline; 455 *p = '\0'; 456 Priorities[NumPriorities].pri_name = newstr(&bp[1]); 457 Priorities[NumPriorities].pri_val = atoi(++p); 458 NumPriorities++; 459 break; 460 461 case 'T': /* trusted user(s) */ 462 /* this option is obsolete, but will be ignored */ 463 break; 464 465 case 'V': /* configuration syntax version */ 466 for (p = &bp[1]; isascii(*p) && isspace(*p); p++) 467 continue; 468 if (!isascii(*p) || !isdigit(*p)) 469 { 470 syserr("invalid argument to V line: \"%.20s\"", 471 &bp[1]); 472 break; 473 } 474 ConfigLevel = strtol(p, &ep, 10); 475 if (ConfigLevel >= 5) 476 { 477 /* level 5 configs have short name in $w */ 478 p = macvalue('w', e); 479 if (p != NULL && (p = strchr(p, '.')) != NULL) 480 *p = '\0'; 481 } 482 if (*ep++ == '/') 483 { 484 /* extract vendor code */ 485 for (p = ep; isascii(*p) && isalpha(*p); ) 486 p++; 487 *p = '\0'; 488 489 if (!setvendor(ep)) 490 syserr("invalid V line vendor code: \"%s\"", 491 ep); 492 } 493 break; 494 495 case 'K': 496 makemapentry(&bp[1]); 497 break; 498 499 default: 500 badline: 501 syserr("unknown control line \"%s\"", bp); 502 } 503 if (bp != buf) 504 free(bp); 505 } 506 if (ferror(cf)) 507 { 508 syserr("I/O read error", cfname); 509 exit(EX_OSFILE); 510 } 511 fclose(cf); 512 FileName = NULL; 513 514 if (stab("host", ST_MAP, ST_FIND) == NULL) 515 { 516 /* user didn't initialize: set up host map */ 517 strcpy(buf, "host host"); 518 #if NAMED_BIND 519 if (ConfigLevel >= 2) 520 strcat(buf, " -a."); 521 #endif 522 makemapentry(buf); 523 } 524 } 525 /* 526 ** TOOMANY -- signal too many of some option 527 ** 528 ** Parameters: 529 ** id -- the id of the error line 530 ** maxcnt -- the maximum possible values 531 ** 532 ** Returns: 533 ** none. 534 ** 535 ** Side Effects: 536 ** gives a syserr. 537 */ 538 539 toomany(id, maxcnt) 540 char id; 541 int maxcnt; 542 { 543 syserr("too many %c lines, %d max", id, maxcnt); 544 } 545 /* 546 ** FILECLASS -- read members of a class from a file 547 ** 548 ** Parameters: 549 ** class -- class to define. 550 ** filename -- name of file to read. 551 ** fmt -- scanf string to use for match. 552 ** safe -- if set, this is a safe read. 553 ** optional -- if set, it is not an error for the file to 554 ** not exist. 555 ** 556 ** Returns: 557 ** none 558 ** 559 ** Side Effects: 560 ** 561 ** puts all lines in filename that match a scanf into 562 ** the named class. 563 */ 564 565 fileclass(class, filename, fmt, safe, optional) 566 int class; 567 char *filename; 568 char *fmt; 569 bool safe; 570 bool optional; 571 { 572 FILE *f; 573 struct stat stbuf; 574 char buf[MAXLINE]; 575 576 if (tTd(37, 2)) 577 printf("fileclass(%s, fmt=%s)\n", filename, fmt); 578 579 if (filename[0] == '|') 580 { 581 syserr("fileclass: pipes (F%c%s) not supported due to security problems", 582 class, filename); 583 return; 584 } 585 if (stat(filename, &stbuf) < 0) 586 { 587 if (tTd(37, 2)) 588 printf(" cannot stat (%s)\n", errstring(errno)); 589 if (!optional) 590 syserr("fileclass: cannot stat %s", filename); 591 return; 592 } 593 if (!S_ISREG(stbuf.st_mode)) 594 { 595 syserr("fileclass: %s not a regular file", filename); 596 return; 597 } 598 if (!safe && access(filename, R_OK) < 0) 599 { 600 syserr("fileclass: access denied on %s", filename); 601 return; 602 } 603 f = fopen(filename, "r"); 604 if (f == NULL) 605 { 606 syserr("fileclass: cannot open %s", filename); 607 return; 608 } 609 610 while (fgets(buf, sizeof buf, f) != NULL) 611 { 612 register STAB *s; 613 register char *p; 614 # ifdef SCANF 615 char wordbuf[MAXNAME+1]; 616 617 if (sscanf(buf, fmt, wordbuf) != 1) 618 continue; 619 p = wordbuf; 620 # else /* SCANF */ 621 p = buf; 622 # endif /* SCANF */ 623 624 /* 625 ** Break up the match into words. 626 */ 627 628 while (*p != '\0') 629 { 630 register char *q; 631 632 /* strip leading spaces */ 633 while (isascii(*p) && isspace(*p)) 634 p++; 635 if (*p == '\0') 636 break; 637 638 /* find the end of the word */ 639 q = p; 640 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 641 p++; 642 if (*p != '\0') 643 *p++ = '\0'; 644 645 /* enter the word in the symbol table */ 646 setclass(class, q); 647 } 648 } 649 650 (void) fclose(f); 651 } 652 /* 653 ** MAKEMAILER -- define a new mailer. 654 ** 655 ** Parameters: 656 ** line -- description of mailer. This is in labeled 657 ** fields. The fields are: 658 ** P -- the path to the mailer 659 ** F -- the flags associated with the mailer 660 ** A -- the argv for this mailer 661 ** S -- the sender rewriting set 662 ** R -- the recipient rewriting set 663 ** E -- the eol string 664 ** The first word is the canonical name of the mailer. 665 ** 666 ** Returns: 667 ** none. 668 ** 669 ** Side Effects: 670 ** enters the mailer into the mailer table. 671 */ 672 673 makemailer(line) 674 char *line; 675 { 676 register char *p; 677 register struct mailer *m; 678 register STAB *s; 679 int i; 680 char fcode; 681 auto char *endp; 682 extern int NextMailer; 683 extern char **makeargv(); 684 extern char *munchstring(); 685 extern long atol(); 686 687 /* allocate a mailer and set up defaults */ 688 m = (struct mailer *) xalloc(sizeof *m); 689 bzero((char *) m, sizeof *m); 690 m->m_eol = "\n"; 691 692 /* collect the mailer name */ 693 for (p = line; *p != '\0' && *p != ',' && !(isascii(*p) && isspace(*p)); p++) 694 continue; 695 if (*p != '\0') 696 *p++ = '\0'; 697 m->m_name = newstr(line); 698 699 /* now scan through and assign info from the fields */ 700 while (*p != '\0') 701 { 702 auto char *delimptr; 703 704 while (*p != '\0' && (*p == ',' || (isascii(*p) && isspace(*p)))) 705 p++; 706 707 /* p now points to field code */ 708 fcode = *p; 709 while (*p != '\0' && *p != '=' && *p != ',') 710 p++; 711 if (*p++ != '=') 712 { 713 syserr("mailer %s: `=' expected", m->m_name); 714 return; 715 } 716 while (isascii(*p) && isspace(*p)) 717 p++; 718 719 /* p now points to the field body */ 720 p = munchstring(p, &delimptr); 721 722 /* install the field into the mailer struct */ 723 switch (fcode) 724 { 725 case 'P': /* pathname */ 726 m->m_mailer = newstr(p); 727 break; 728 729 case 'F': /* flags */ 730 for (; *p != '\0'; p++) 731 if (!(isascii(*p) && isspace(*p))) 732 setbitn(*p, m->m_flags); 733 break; 734 735 case 'S': /* sender rewriting ruleset */ 736 case 'R': /* recipient rewriting ruleset */ 737 i = strtol(p, &endp, 10); 738 if (i < 0 || i >= MAXRWSETS) 739 { 740 syserr("invalid rewrite set, %d max", MAXRWSETS); 741 return; 742 } 743 if (fcode == 'S') 744 m->m_sh_rwset = m->m_se_rwset = i; 745 else 746 m->m_rh_rwset = m->m_re_rwset = i; 747 748 p = endp; 749 if (*p++ == '/') 750 { 751 i = strtol(p, NULL, 10); 752 if (i < 0 || i >= MAXRWSETS) 753 { 754 syserr("invalid rewrite set, %d max", 755 MAXRWSETS); 756 return; 757 } 758 if (fcode == 'S') 759 m->m_sh_rwset = i; 760 else 761 m->m_rh_rwset = i; 762 } 763 break; 764 765 case 'E': /* end of line string */ 766 m->m_eol = newstr(p); 767 break; 768 769 case 'A': /* argument vector */ 770 m->m_argv = makeargv(p); 771 break; 772 773 case 'M': /* maximum message size */ 774 m->m_maxsize = atol(p); 775 break; 776 777 case 'L': /* maximum line length */ 778 m->m_linelimit = atoi(p); 779 break; 780 781 case 'D': /* working directory */ 782 m->m_execdir = newstr(p); 783 break; 784 } 785 786 p = delimptr; 787 } 788 789 /* do some heuristic cleanup for back compatibility */ 790 if (bitnset(M_LIMITS, m->m_flags)) 791 { 792 if (m->m_linelimit == 0) 793 m->m_linelimit = SMTPLINELIM; 794 if (ConfigLevel < 2) 795 setbitn(M_7BITS, m->m_flags); 796 } 797 798 /* do some rationality checking */ 799 if (m->m_argv == NULL) 800 { 801 syserr("M%s: A= argument required", m->m_name); 802 return; 803 } 804 if (m->m_mailer == NULL) 805 { 806 syserr("M%s: P= argument required", m->m_name); 807 return; 808 } 809 810 if (NextMailer >= MAXMAILERS) 811 { 812 syserr("too many mailers defined (%d max)", MAXMAILERS); 813 return; 814 } 815 816 s = stab(m->m_name, ST_MAILER, ST_ENTER); 817 if (s->s_mailer != NULL) 818 { 819 i = s->s_mailer->m_mno; 820 free(s->s_mailer); 821 } 822 else 823 { 824 i = NextMailer++; 825 } 826 Mailer[i] = s->s_mailer = m; 827 m->m_mno = i; 828 } 829 /* 830 ** MUNCHSTRING -- translate a string into internal form. 831 ** 832 ** Parameters: 833 ** p -- the string to munch. 834 ** delimptr -- if non-NULL, set to the pointer of the 835 ** field delimiter character. 836 ** 837 ** Returns: 838 ** the munched string. 839 */ 840 841 char * 842 munchstring(p, delimptr) 843 register char *p; 844 char **delimptr; 845 { 846 register char *q; 847 bool backslash = FALSE; 848 bool quotemode = FALSE; 849 static char buf[MAXLINE]; 850 851 for (q = buf; *p != '\0'; p++) 852 { 853 if (backslash) 854 { 855 /* everything is roughly literal */ 856 backslash = FALSE; 857 switch (*p) 858 { 859 case 'r': /* carriage return */ 860 *q++ = '\r'; 861 continue; 862 863 case 'n': /* newline */ 864 *q++ = '\n'; 865 continue; 866 867 case 'f': /* form feed */ 868 *q++ = '\f'; 869 continue; 870 871 case 'b': /* backspace */ 872 *q++ = '\b'; 873 continue; 874 } 875 *q++ = *p; 876 } 877 else 878 { 879 if (*p == '\\') 880 backslash = TRUE; 881 else if (*p == '"') 882 quotemode = !quotemode; 883 else if (quotemode || *p != ',') 884 *q++ = *p; 885 else 886 break; 887 } 888 } 889 890 if (delimptr != NULL) 891 *delimptr = p; 892 *q++ = '\0'; 893 return (buf); 894 } 895 /* 896 ** MAKEARGV -- break up a string into words 897 ** 898 ** Parameters: 899 ** p -- the string to break up. 900 ** 901 ** Returns: 902 ** a char **argv (dynamically allocated) 903 ** 904 ** Side Effects: 905 ** munges p. 906 */ 907 908 char ** 909 makeargv(p) 910 register char *p; 911 { 912 char *q; 913 int i; 914 char **avp; 915 char *argv[MAXPV + 1]; 916 917 /* take apart the words */ 918 i = 0; 919 while (*p != '\0' && i < MAXPV) 920 { 921 q = p; 922 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 923 p++; 924 while (isascii(*p) && isspace(*p)) 925 *p++ = '\0'; 926 argv[i++] = newstr(q); 927 } 928 argv[i++] = NULL; 929 930 /* now make a copy of the argv */ 931 avp = (char **) xalloc(sizeof *avp * i); 932 bcopy((char *) argv, (char *) avp, sizeof *avp * i); 933 934 return (avp); 935 } 936 /* 937 ** PRINTRULES -- print rewrite rules (for debugging) 938 ** 939 ** Parameters: 940 ** none. 941 ** 942 ** Returns: 943 ** none. 944 ** 945 ** Side Effects: 946 ** prints rewrite rules. 947 */ 948 949 printrules() 950 { 951 register struct rewrite *rwp; 952 register int ruleset; 953 954 for (ruleset = 0; ruleset < 10; ruleset++) 955 { 956 if (RewriteRules[ruleset] == NULL) 957 continue; 958 printf("\n----Rule Set %d:", ruleset); 959 960 for (rwp = RewriteRules[ruleset]; rwp != NULL; rwp = rwp->r_next) 961 { 962 printf("\nLHS:"); 963 printav(rwp->r_lhs); 964 printf("RHS:"); 965 printav(rwp->r_rhs); 966 } 967 } 968 } 969 970 /* 971 ** SETOPTION -- set global processing option 972 ** 973 ** Parameters: 974 ** opt -- option name. 975 ** val -- option value (as a text string). 976 ** safe -- set if this came from a configuration file. 977 ** Some options (if set from the command line) will 978 ** reset the user id to avoid security problems. 979 ** sticky -- if set, don't let other setoptions override 980 ** this value. 981 ** e -- the main envelope. 982 ** 983 ** Returns: 984 ** none. 985 ** 986 ** Side Effects: 987 ** Sets options as implied by the arguments. 988 */ 989 990 static BITMAP StickyOpt; /* set if option is stuck */ 991 992 993 #if NAMED_BIND 994 995 struct resolverflags 996 { 997 char *rf_name; /* name of the flag */ 998 long rf_bits; /* bits to set/clear */ 999 } ResolverFlags[] = 1000 { 1001 "debug", RES_DEBUG, 1002 "aaonly", RES_AAONLY, 1003 "usevc", RES_USEVC, 1004 "primary", RES_PRIMARY, 1005 "igntc", RES_IGNTC, 1006 "recurse", RES_RECURSE, 1007 "defnames", RES_DEFNAMES, 1008 "stayopen", RES_STAYOPEN, 1009 "dnsrch", RES_DNSRCH, 1010 "true", 0, /* to avoid error on old syntax */ 1011 NULL, 0 1012 }; 1013 1014 #endif 1015 1016 setoption(opt, val, safe, sticky, e) 1017 char opt; 1018 char *val; 1019 bool safe; 1020 bool sticky; 1021 register ENVELOPE *e; 1022 { 1023 register char *p; 1024 extern bool atobool(); 1025 extern time_t convtime(); 1026 extern int QueueLA; 1027 extern int RefuseLA; 1028 extern bool Warn_Q_option; 1029 extern bool trusteduser(); 1030 1031 if (tTd(37, 1)) 1032 printf("setoption %c=%s", opt, val); 1033 1034 /* 1035 ** See if this option is preset for us. 1036 */ 1037 1038 if (!sticky && bitnset(opt, StickyOpt)) 1039 { 1040 if (tTd(37, 1)) 1041 printf(" (ignored)\n"); 1042 return; 1043 } 1044 1045 /* 1046 ** Check to see if this option can be specified by this user. 1047 */ 1048 1049 if (!safe && RealUid == 0) 1050 safe = TRUE; 1051 if (!safe && strchr("bCdeijLmoprsvw7", opt) == NULL) 1052 { 1053 if (opt != 'M' || (val[0] != 'r' && val[0] != 's')) 1054 { 1055 if (tTd(37, 1)) 1056 printf(" (unsafe)"); 1057 if (RealUid != geteuid()) 1058 { 1059 if (tTd(37, 1)) 1060 printf("(Resetting uid)"); 1061 (void) setgid(RealGid); 1062 (void) setuid(RealUid); 1063 } 1064 } 1065 } 1066 if (tTd(37, 1)) 1067 printf("\n"); 1068 1069 switch (opt) 1070 { 1071 case '7': /* force seven-bit input */ 1072 SevenBit = atobool(val); 1073 break; 1074 1075 case 'A': /* set default alias file */ 1076 if (val[0] == '\0') 1077 setalias("aliases"); 1078 else 1079 setalias(val); 1080 break; 1081 1082 case 'a': /* look N minutes for "@:@" in alias file */ 1083 if (val[0] == '\0') 1084 SafeAlias = 5 * 60; /* five minutes */ 1085 else 1086 SafeAlias = convtime(val, 'm'); 1087 break; 1088 1089 case 'B': /* substitution for blank character */ 1090 SpaceSub = val[0]; 1091 if (SpaceSub == '\0') 1092 SpaceSub = ' '; 1093 break; 1094 1095 case 'b': /* min blocks free on queue fs/max msg size */ 1096 p = strchr(val, '/'); 1097 if (p != NULL) 1098 { 1099 *p++ = '\0'; 1100 MaxMessageSize = atol(p); 1101 } 1102 MinBlocksFree = atol(val); 1103 break; 1104 1105 case 'c': /* don't connect to "expensive" mailers */ 1106 NoConnect = atobool(val); 1107 break; 1108 1109 case 'C': /* checkpoint every N addresses */ 1110 CheckpointInterval = atoi(val); 1111 break; 1112 1113 case 'd': /* delivery mode */ 1114 switch (*val) 1115 { 1116 case '\0': 1117 e->e_sendmode = SM_DELIVER; 1118 break; 1119 1120 case SM_QUEUE: /* queue only */ 1121 #ifndef QUEUE 1122 syserr("need QUEUE to set -odqueue"); 1123 #endif /* QUEUE */ 1124 /* fall through..... */ 1125 1126 case SM_DELIVER: /* do everything */ 1127 case SM_FORK: /* fork after verification */ 1128 e->e_sendmode = *val; 1129 break; 1130 1131 default: 1132 syserr("Unknown delivery mode %c", *val); 1133 exit(EX_USAGE); 1134 } 1135 break; 1136 1137 case 'D': /* rebuild alias database as needed */ 1138 AutoRebuild = atobool(val); 1139 break; 1140 1141 case 'E': /* error message header/header file */ 1142 if (*val != '\0') 1143 ErrMsgFile = newstr(val); 1144 break; 1145 1146 case 'e': /* set error processing mode */ 1147 switch (*val) 1148 { 1149 case EM_QUIET: /* be silent about it */ 1150 case EM_MAIL: /* mail back */ 1151 case EM_BERKNET: /* do berknet error processing */ 1152 case EM_WRITE: /* write back (or mail) */ 1153 case EM_PRINT: /* print errors normally (default) */ 1154 e->e_errormode = *val; 1155 break; 1156 } 1157 break; 1158 1159 case 'F': /* file mode */ 1160 FileMode = atooct(val) & 0777; 1161 break; 1162 1163 case 'f': /* save Unix-style From lines on front */ 1164 SaveFrom = atobool(val); 1165 break; 1166 1167 case 'G': /* match recipients against GECOS field */ 1168 MatchGecos = atobool(val); 1169 break; 1170 1171 case 'g': /* default gid */ 1172 if (isascii(*val) && isdigit(*val)) 1173 DefGid = atoi(val); 1174 else 1175 { 1176 register struct group *gr; 1177 1178 DefGid = -1; 1179 gr = getgrnam(val); 1180 if (gr == NULL) 1181 syserr("readcf: option g: unknown group %s", val); 1182 else 1183 DefGid = gr->gr_gid; 1184 } 1185 break; 1186 1187 case 'H': /* help file */ 1188 if (val[0] == '\0') 1189 HelpFile = "sendmail.hf"; 1190 else 1191 HelpFile = newstr(val); 1192 break; 1193 1194 case 'h': /* maximum hop count */ 1195 MaxHopCount = atoi(val); 1196 break; 1197 1198 case 'I': /* use internet domain name server */ 1199 #if NAMED_BIND 1200 UseNameServer = TRUE; 1201 for (p = val; *p != 0; ) 1202 { 1203 bool clearmode; 1204 char *q; 1205 struct resolverflags *rfp; 1206 1207 while (*p == ' ') 1208 p++; 1209 if (*p == '\0') 1210 break; 1211 clearmode = FALSE; 1212 if (*p == '-') 1213 clearmode = TRUE; 1214 else if (*p != '+') 1215 p--; 1216 p++; 1217 q = p; 1218 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 1219 p++; 1220 if (*p != '\0') 1221 *p++ = '\0'; 1222 for (rfp = ResolverFlags; rfp->rf_name != NULL; rfp++) 1223 { 1224 if (strcasecmp(q, rfp->rf_name) == 0) 1225 break; 1226 } 1227 if (rfp->rf_name == NULL) 1228 syserr("readcf: I option value %s unrecognized", q); 1229 else if (clearmode) 1230 _res.options &= ~rfp->rf_bits; 1231 else 1232 _res.options |= rfp->rf_bits; 1233 } 1234 if (tTd(8, 2)) 1235 printf("_res.options = %x\n", _res.options); 1236 #else 1237 usrerr("name server (I option) specified but BIND not compiled in"); 1238 #endif 1239 break; 1240 1241 case 'i': /* ignore dot lines in message */ 1242 IgnrDot = atobool(val); 1243 break; 1244 1245 case 'j': /* send errors in MIME (RFC 1341) format */ 1246 SendMIMEErrors = atobool(val); 1247 break; 1248 1249 case 'J': /* .forward search path */ 1250 ForwardPath = newstr(val); 1251 break; 1252 1253 case 'k': /* connection cache size */ 1254 MaxMciCache = atoi(val); 1255 if (MaxMciCache < 0) 1256 MaxMciCache = 0; 1257 break; 1258 1259 case 'K': /* connection cache timeout */ 1260 MciCacheTimeout = convtime(val, 'm'); 1261 break; 1262 1263 case 'l': /* use Errors-To: header */ 1264 UseErrorsTo = atobool(val); 1265 break; 1266 1267 case 'L': /* log level */ 1268 if (safe || LogLevel < atoi(val)) 1269 LogLevel = atoi(val); 1270 break; 1271 1272 case 'M': /* define macro */ 1273 define(val[0], newstr(&val[1]), CurEnv); 1274 sticky = FALSE; 1275 break; 1276 1277 case 'm': /* send to me too */ 1278 MeToo = atobool(val); 1279 break; 1280 1281 case 'n': /* validate RHS in newaliases */ 1282 CheckAliases = atobool(val); 1283 break; 1284 1285 /* 'N' available -- was "net name" */ 1286 1287 case 'O': /* daemon options */ 1288 setdaemonoptions(val); 1289 break; 1290 1291 case 'o': /* assume old style headers */ 1292 if (atobool(val)) 1293 CurEnv->e_flags |= EF_OLDSTYLE; 1294 else 1295 CurEnv->e_flags &= ~EF_OLDSTYLE; 1296 break; 1297 1298 case 'p': /* select privacy level */ 1299 p = val; 1300 for (;;) 1301 { 1302 register struct prival *pv; 1303 extern struct prival PrivacyValues[]; 1304 1305 while (isascii(*p) && (isspace(*p) || ispunct(*p))) 1306 p++; 1307 if (*p == '\0') 1308 break; 1309 val = p; 1310 while (isascii(*p) && isalnum(*p)) 1311 p++; 1312 if (*p != '\0') 1313 *p++ = '\0'; 1314 1315 for (pv = PrivacyValues; pv->pv_name != NULL; pv++) 1316 { 1317 if (strcasecmp(val, pv->pv_name) == 0) 1318 break; 1319 } 1320 if (pv->pv_name == NULL) 1321 syserr("readcf: Op line: %s unrecognized", val); 1322 PrivacyFlags |= pv->pv_flag; 1323 } 1324 break; 1325 1326 case 'P': /* postmaster copy address for returned mail */ 1327 PostMasterCopy = newstr(val); 1328 break; 1329 1330 case 'q': /* slope of queue only function */ 1331 QueueFactor = atoi(val); 1332 break; 1333 1334 case 'Q': /* queue directory */ 1335 if (val[0] == '\0') 1336 QueueDir = "mqueue"; 1337 else 1338 QueueDir = newstr(val); 1339 if (RealUid != 0 && !safe) 1340 Warn_Q_option = TRUE; 1341 break; 1342 1343 case 'R': /* don't prune routes */ 1344 DontPruneRoutes = atobool(val); 1345 break; 1346 1347 case 'r': /* read timeout */ 1348 settimeouts(val); 1349 break; 1350 1351 case 'S': /* status file */ 1352 if (val[0] == '\0') 1353 StatFile = "sendmail.st"; 1354 else 1355 StatFile = newstr(val); 1356 break; 1357 1358 case 's': /* be super safe, even if expensive */ 1359 SuperSafe = atobool(val); 1360 break; 1361 1362 case 'T': /* queue timeout */ 1363 p = strchr(val, '/'); 1364 if (p != NULL) 1365 { 1366 *p++ = '\0'; 1367 TimeOuts.to_q_warning = convtime(p, 'd'); 1368 } 1369 TimeOuts.to_q_return = convtime(val, 'h'); 1370 break; 1371 1372 case 't': /* time zone name */ 1373 TimeZoneSpec = newstr(val); 1374 break; 1375 1376 case 'U': /* location of user database */ 1377 UdbSpec = newstr(val); 1378 break; 1379 1380 case 'u': /* set default uid */ 1381 if (isascii(*val) && isdigit(*val)) 1382 DefUid = atoi(val); 1383 else 1384 { 1385 register struct passwd *pw; 1386 1387 DefUid = -1; 1388 pw = getpwnam(val); 1389 if (pw == NULL) 1390 syserr("readcf: option u: unknown user %s", val); 1391 else 1392 DefUid = pw->pw_uid; 1393 } 1394 setdefuser(); 1395 break; 1396 1397 case 'V': /* fallback MX host */ 1398 FallBackMX = newstr(val); 1399 break; 1400 1401 case 'v': /* run in verbose mode */ 1402 Verbose = atobool(val); 1403 break; 1404 1405 case 'w': /* if we are best MX, try host directly */ 1406 TryNullMXList = atobool(val); 1407 break; 1408 1409 /* 'W' available -- was wizard password */ 1410 1411 case 'x': /* load avg at which to auto-queue msgs */ 1412 QueueLA = atoi(val); 1413 break; 1414 1415 case 'X': /* load avg at which to auto-reject connections */ 1416 RefuseLA = atoi(val); 1417 break; 1418 1419 case 'y': /* work recipient factor */ 1420 WkRecipFact = atoi(val); 1421 break; 1422 1423 case 'Y': /* fork jobs during queue runs */ 1424 ForkQueueRuns = atobool(val); 1425 break; 1426 1427 case 'z': /* work message class factor */ 1428 WkClassFact = atoi(val); 1429 break; 1430 1431 case 'Z': /* work time factor */ 1432 WkTimeFact = atoi(val); 1433 break; 1434 1435 default: 1436 break; 1437 } 1438 if (sticky) 1439 setbitn(opt, StickyOpt); 1440 return; 1441 } 1442 /* 1443 ** SETCLASS -- set a word into a class 1444 ** 1445 ** Parameters: 1446 ** class -- the class to put the word in. 1447 ** word -- the word to enter 1448 ** 1449 ** Returns: 1450 ** none. 1451 ** 1452 ** Side Effects: 1453 ** puts the word into the symbol table. 1454 */ 1455 1456 setclass(class, word) 1457 int class; 1458 char *word; 1459 { 1460 register STAB *s; 1461 1462 if (tTd(37, 8)) 1463 printf("setclass(%c, %s)\n", class, word); 1464 s = stab(word, ST_CLASS, ST_ENTER); 1465 setbitn(class, s->s_class); 1466 } 1467 /* 1468 ** MAKEMAPENTRY -- create a map entry 1469 ** 1470 ** Parameters: 1471 ** line -- the config file line 1472 ** 1473 ** Returns: 1474 ** TRUE if it successfully entered the map entry. 1475 ** FALSE otherwise (usually syntax error). 1476 ** 1477 ** Side Effects: 1478 ** Enters the map into the dictionary. 1479 */ 1480 1481 void 1482 makemapentry(line) 1483 char *line; 1484 { 1485 register char *p; 1486 char *mapname; 1487 char *classname; 1488 register STAB *s; 1489 STAB *class; 1490 1491 for (p = line; isascii(*p) && isspace(*p); p++) 1492 continue; 1493 if (!(isascii(*p) && isalnum(*p))) 1494 { 1495 syserr("readcf: config K line: no map name"); 1496 return; 1497 } 1498 1499 mapname = p; 1500 while (isascii(*++p) && isalnum(*p)) 1501 continue; 1502 if (*p != '\0') 1503 *p++ = '\0'; 1504 while (isascii(*p) && isspace(*p)) 1505 p++; 1506 if (!(isascii(*p) && isalnum(*p))) 1507 { 1508 syserr("readcf: config K line, map %s: no map class", mapname); 1509 return; 1510 } 1511 classname = p; 1512 while (isascii(*++p) && isalnum(*p)) 1513 continue; 1514 if (*p != '\0') 1515 *p++ = '\0'; 1516 while (isascii(*p) && isspace(*p)) 1517 p++; 1518 1519 /* look up the class */ 1520 class = stab(classname, ST_MAPCLASS, ST_FIND); 1521 if (class == NULL) 1522 { 1523 syserr("readcf: map %s: class %s not available", mapname, classname); 1524 return; 1525 } 1526 1527 /* enter the map */ 1528 s = stab(mapname, ST_MAP, ST_ENTER); 1529 s->s_map.map_class = &class->s_mapclass; 1530 s->s_map.map_mname = newstr(mapname); 1531 1532 if (class->s_mapclass.map_parse(&s->s_map, p)) 1533 s->s_map.map_mflags |= MF_VALID; 1534 1535 if (tTd(37, 5)) 1536 { 1537 printf("map %s, class %s, flags %x, file %s,\n", 1538 s->s_map.map_mname, s->s_map.map_class->map_cname, 1539 s->s_map.map_mflags, 1540 s->s_map.map_file == NULL ? "(null)" : s->s_map.map_file); 1541 printf("\tapp %s, domain %s, rebuild %s\n", 1542 s->s_map.map_app == NULL ? "(null)" : s->s_map.map_app, 1543 s->s_map.map_domain == NULL ? "(null)" : s->s_map.map_domain, 1544 s->s_map.map_rebuild == NULL ? "(null)" : s->s_map.map_rebuild); 1545 } 1546 } 1547 /* 1548 ** SETTIMEOUTS -- parse and set timeout values 1549 ** 1550 ** Parameters: 1551 ** val -- a pointer to the values. If NULL, do initial 1552 ** settings. 1553 ** 1554 ** Returns: 1555 ** none. 1556 ** 1557 ** Side Effects: 1558 ** Initializes the TimeOuts structure 1559 */ 1560 1561 #define SECONDS 1562 #define MINUTES * 60 1563 #define HOUR * 3600 1564 1565 settimeouts(val) 1566 register char *val; 1567 { 1568 register char *p; 1569 extern time_t convtime(); 1570 1571 if (val == NULL) 1572 { 1573 TimeOuts.to_initial = (time_t) 5 MINUTES; 1574 TimeOuts.to_helo = (time_t) 5 MINUTES; 1575 TimeOuts.to_mail = (time_t) 10 MINUTES; 1576 TimeOuts.to_rcpt = (time_t) 1 HOUR; 1577 TimeOuts.to_datainit = (time_t) 5 MINUTES; 1578 TimeOuts.to_datablock = (time_t) 1 HOUR; 1579 TimeOuts.to_datafinal = (time_t) 1 HOUR; 1580 TimeOuts.to_rset = (time_t) 5 MINUTES; 1581 TimeOuts.to_quit = (time_t) 2 MINUTES; 1582 TimeOuts.to_nextcommand = (time_t) 1 HOUR; 1583 TimeOuts.to_miscshort = (time_t) 2 MINUTES; 1584 TimeOuts.to_ident = (time_t) 30 SECONDS; 1585 return; 1586 } 1587 1588 for (;; val = p) 1589 { 1590 while (isascii(*val) && isspace(*val)) 1591 val++; 1592 if (*val == '\0') 1593 break; 1594 for (p = val; *p != '\0' && *p != ','; p++) 1595 continue; 1596 if (*p != '\0') 1597 *p++ = '\0'; 1598 1599 if (isascii(*val) && isdigit(*val)) 1600 { 1601 /* old syntax -- set everything */ 1602 TimeOuts.to_mail = convtime(val, 'm'); 1603 TimeOuts.to_rcpt = TimeOuts.to_mail; 1604 TimeOuts.to_datainit = TimeOuts.to_mail; 1605 TimeOuts.to_datablock = TimeOuts.to_mail; 1606 TimeOuts.to_datafinal = TimeOuts.to_mail; 1607 TimeOuts.to_nextcommand = TimeOuts.to_mail; 1608 continue; 1609 } 1610 else 1611 { 1612 register char *q = strchr(val, '='); 1613 time_t to; 1614 1615 if (q == NULL) 1616 { 1617 /* syntax error */ 1618 continue; 1619 } 1620 *q++ = '\0'; 1621 to = convtime(q, 'm'); 1622 1623 if (strcasecmp(val, "initial") == 0) 1624 TimeOuts.to_initial = to; 1625 else if (strcasecmp(val, "mail") == 0) 1626 TimeOuts.to_mail = to; 1627 else if (strcasecmp(val, "rcpt") == 0) 1628 TimeOuts.to_rcpt = to; 1629 else if (strcasecmp(val, "datainit") == 0) 1630 TimeOuts.to_datainit = to; 1631 else if (strcasecmp(val, "datablock") == 0) 1632 TimeOuts.to_datablock = to; 1633 else if (strcasecmp(val, "datafinal") == 0) 1634 TimeOuts.to_datafinal = to; 1635 else if (strcasecmp(val, "command") == 0) 1636 TimeOuts.to_nextcommand = to; 1637 else if (strcasecmp(val, "rset") == 0) 1638 TimeOuts.to_rset = to; 1639 else if (strcasecmp(val, "helo") == 0) 1640 TimeOuts.to_helo = to; 1641 else if (strcasecmp(val, "quit") == 0) 1642 TimeOuts.to_quit = to; 1643 else if (strcasecmp(val, "misc") == 0) 1644 TimeOuts.to_miscshort = to; 1645 else if (strcasecmp(val, "ident") == 0) 1646 TimeOuts.to_ident = to; 1647 else 1648 syserr("settimeouts: invalid timeout %s", val); 1649 } 1650 } 1651 } 1652