1 /* 2 * Copyright (c) 1998-2002 Sendmail, Inc. and its suppliers. 3 * All rights reserved. 4 * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved. 5 * Copyright (c) 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * By using this file, you agree to the terms and conditions set 9 * forth in the LICENSE file which can be found at the top level of 10 * the sendmail distribution. 11 * 12 */ 13 14 #include <sendmail.h> 15 16 SM_RCSID("@(#)$Id: util.c,v 8.363.2.1 2002/06/21 20:25:25 ca Exp $") 17 18 #include <sysexits.h> 19 #include <sm/xtrap.h> 20 21 /* 22 ** ADDQUOTES -- Adds quotes & quote bits to a string. 23 ** 24 ** Runs through a string and adds backslashes and quote bits. 25 ** 26 ** Parameters: 27 ** s -- the string to modify. 28 ** rpool -- resource pool from which to allocate result 29 ** 30 ** Returns: 31 ** pointer to quoted string. 32 */ 33 34 char * 35 addquotes(s, rpool) 36 char *s; 37 SM_RPOOL_T *rpool; 38 { 39 int len = 0; 40 char c; 41 char *p = s, *q, *r; 42 43 if (s == NULL) 44 return NULL; 45 46 /* Find length of quoted string */ 47 while ((c = *p++) != '\0') 48 { 49 len++; 50 if (c == '\\' || c == '"') 51 len++; 52 } 53 54 q = r = sm_rpool_malloc_x(rpool, len + 3); 55 p = s; 56 57 /* add leading quote */ 58 *q++ = '"'; 59 while ((c = *p++) != '\0') 60 { 61 /* quote \ or " */ 62 if (c == '\\' || c == '"') 63 *q++ = '\\'; 64 *q++ = c; 65 } 66 *q++ = '"'; 67 *q = '\0'; 68 return r; 69 } 70 /* 71 ** RFC822_STRING -- Checks string for proper RFC822 string quoting. 72 ** 73 ** Runs through a string and verifies RFC822 special characters 74 ** are only found inside comments, quoted strings, or backslash 75 ** escaped. Also verified balanced quotes and parenthesis. 76 ** 77 ** Parameters: 78 ** s -- the string to modify. 79 ** 80 ** Returns: 81 ** true iff the string is RFC822 compliant, false otherwise. 82 */ 83 84 bool 85 rfc822_string(s) 86 char *s; 87 { 88 bool quoted = false; 89 int commentlev = 0; 90 char *c = s; 91 92 if (s == NULL) 93 return false; 94 95 while (*c != '\0') 96 { 97 /* escaped character */ 98 if (*c == '\\') 99 { 100 c++; 101 if (*c == '\0') 102 return false; 103 } 104 else if (commentlev == 0 && *c == '"') 105 quoted = !quoted; 106 else if (!quoted) 107 { 108 if (*c == ')') 109 { 110 /* unbalanced ')' */ 111 if (commentlev == 0) 112 return false; 113 else 114 commentlev--; 115 } 116 else if (*c == '(') 117 commentlev++; 118 else if (commentlev == 0 && 119 strchr(MustQuoteChars, *c) != NULL) 120 return false; 121 } 122 c++; 123 } 124 125 /* unbalanced '"' or '(' */ 126 return !quoted && commentlev == 0; 127 } 128 /* 129 ** SHORTEN_RFC822_STRING -- Truncate and rebalance an RFC822 string 130 ** 131 ** Arbitrarily shorten (in place) an RFC822 string and rebalance 132 ** comments and quotes. 133 ** 134 ** Parameters: 135 ** string -- the string to shorten 136 ** length -- the maximum size, 0 if no maximum 137 ** 138 ** Returns: 139 ** true if string is changed, false otherwise 140 ** 141 ** Side Effects: 142 ** Changes string in place, possibly resulting 143 ** in a shorter string. 144 */ 145 146 bool 147 shorten_rfc822_string(string, length) 148 char *string; 149 size_t length; 150 { 151 bool backslash = false; 152 bool modified = false; 153 bool quoted = false; 154 size_t slen; 155 int parencount = 0; 156 char *ptr = string; 157 158 /* 159 ** If have to rebalance an already short enough string, 160 ** need to do it within allocated space. 161 */ 162 163 slen = strlen(string); 164 if (length == 0 || slen < length) 165 length = slen; 166 167 while (*ptr != '\0') 168 { 169 if (backslash) 170 { 171 backslash = false; 172 goto increment; 173 } 174 175 if (*ptr == '\\') 176 backslash = true; 177 else if (*ptr == '(') 178 { 179 if (!quoted) 180 parencount++; 181 } 182 else if (*ptr == ')') 183 { 184 if (--parencount < 0) 185 parencount = 0; 186 } 187 188 /* Inside a comment, quotes don't matter */ 189 if (parencount <= 0 && *ptr == '"') 190 quoted = !quoted; 191 192 increment: 193 /* Check for sufficient space for next character */ 194 if (length - (ptr - string) <= (size_t) ((backslash ? 1 : 0) + 195 parencount + 196 (quoted ? 1 : 0))) 197 { 198 /* Not enough, backtrack */ 199 if (*ptr == '\\') 200 backslash = false; 201 else if (*ptr == '(' && !quoted) 202 parencount--; 203 else if (*ptr == '"' && parencount == 0) 204 quoted = false; 205 break; 206 } 207 ptr++; 208 } 209 210 /* Rebalance */ 211 while (parencount-- > 0) 212 { 213 if (*ptr != ')') 214 { 215 modified = true; 216 *ptr = ')'; 217 } 218 ptr++; 219 } 220 if (quoted) 221 { 222 if (*ptr != '"') 223 { 224 modified = true; 225 *ptr = '"'; 226 } 227 ptr++; 228 } 229 if (*ptr != '\0') 230 { 231 modified = true; 232 *ptr = '\0'; 233 } 234 return modified; 235 } 236 /* 237 ** FIND_CHARACTER -- find an unquoted character in an RFC822 string 238 ** 239 ** Find an unquoted, non-commented character in an RFC822 240 ** string and return a pointer to its location in the 241 ** string. 242 ** 243 ** Parameters: 244 ** string -- the string to search 245 ** character -- the character to find 246 ** 247 ** Returns: 248 ** pointer to the character, or 249 ** a pointer to the end of the line if character is not found 250 */ 251 252 char * 253 find_character(string, character) 254 char *string; 255 int character; 256 { 257 bool backslash = false; 258 bool quoted = false; 259 int parencount = 0; 260 261 while (string != NULL && *string != '\0') 262 { 263 if (backslash) 264 { 265 backslash = false; 266 if (!quoted && character == '\\' && *string == '\\') 267 break; 268 string++; 269 continue; 270 } 271 switch (*string) 272 { 273 case '\\': 274 backslash = true; 275 break; 276 277 case '(': 278 if (!quoted) 279 parencount++; 280 break; 281 282 case ')': 283 if (--parencount < 0) 284 parencount = 0; 285 break; 286 } 287 288 /* Inside a comment, nothing matters */ 289 if (parencount > 0) 290 { 291 string++; 292 continue; 293 } 294 295 if (*string == '"') 296 quoted = !quoted; 297 else if (*string == character && !quoted) 298 break; 299 string++; 300 } 301 302 /* Return pointer to the character */ 303 return string; 304 } 305 306 /* 307 ** CHECK_BODYTYPE -- check bodytype parameter 308 ** 309 ** Parameters: 310 ** bodytype -- bodytype parameter 311 ** 312 ** Returns: 313 ** BODYTYPE_* according to parameter 314 ** 315 */ 316 317 int 318 check_bodytype(bodytype) 319 char *bodytype; 320 { 321 /* check body type for legality */ 322 if (bodytype == NULL) 323 return BODYTYPE_NONE; 324 if (sm_strcasecmp(bodytype, "7BIT") == 0) 325 return BODYTYPE_7BIT; 326 if (sm_strcasecmp(bodytype, "8BITMIME") == 0) 327 return BODYTYPE_8BITMIME; 328 return BODYTYPE_ILLEGAL; 329 } 330 331 #if _FFR_BESTMX_BETTER_TRUNCATION || _FFR_DNSMAP_MULTI 332 /* 333 ** TRUNCATE_AT_DELIM -- truncate string at a delimiter and append "..." 334 ** 335 ** Parameters: 336 ** str -- string to truncate 337 ** len -- maximum length (including '\0') (0 for unlimited) 338 ** delim -- delimiter character 339 ** 340 ** Returns: 341 ** None. 342 */ 343 344 void 345 truncate_at_delim(str, len, delim) 346 char *str; 347 size_t len; 348 int delim; 349 { 350 char *p; 351 352 if (str == NULL || len == 0 || strlen(str) < len) 353 return; 354 355 *(str + len - 1) = '\0'; 356 while ((p = strrchr(str, delim)) != NULL) 357 { 358 *p = '\0'; 359 if (p - str + 4 < len) 360 { 361 *p++ = ':'; 362 *p = '\0'; 363 (void) sm_strlcat(str, "...", len); 364 return; 365 } 366 } 367 368 /* Couldn't find a place to append "..." */ 369 if (len > 3) 370 (void) sm_strlcpy(str, "...", len); 371 else 372 str[0] = '\0'; 373 } 374 #endif /* _FFR_BESTMX_BETTER_TRUNCATION || _FFR_DNSMAP_MULTI */ 375 /* 376 ** XALLOC -- Allocate memory, raise an exception on error 377 ** 378 ** Parameters: 379 ** sz -- size of area to allocate. 380 ** 381 ** Returns: 382 ** pointer to data region. 383 ** 384 ** Exceptions: 385 ** SmHeapOutOfMemory (F:sm.heap) -- cannot allocate memory 386 ** 387 ** Side Effects: 388 ** Memory is allocated. 389 */ 390 391 char * 392 #if SM_HEAP_CHECK 393 xalloc_tagged(sz, file, line) 394 register int sz; 395 char *file; 396 int line; 397 #else /* SM_HEAP_CHECK */ 398 xalloc(sz) 399 register int sz; 400 #endif /* SM_HEAP_CHECK */ 401 { 402 register char *p; 403 404 /* some systems can't handle size zero mallocs */ 405 if (sz <= 0) 406 sz = 1; 407 408 /* scaffolding for testing error handling code */ 409 sm_xtrap_raise_x(&SmHeapOutOfMemory); 410 411 p = sm_malloc_tagged((unsigned) sz, file, line, sm_heap_group()); 412 if (p == NULL) 413 { 414 sm_exc_raise_x(&SmHeapOutOfMemory); 415 } 416 return p; 417 } 418 /* 419 ** COPYPLIST -- copy list of pointers. 420 ** 421 ** This routine is the equivalent of strdup for lists of 422 ** pointers. 423 ** 424 ** Parameters: 425 ** list -- list of pointers to copy. 426 ** Must be NULL terminated. 427 ** copycont -- if true, copy the contents of the vector 428 ** (which must be a string) also. 429 ** rpool -- resource pool from which to allocate storage, 430 ** or NULL 431 ** 432 ** Returns: 433 ** a copy of 'list'. 434 */ 435 436 char ** 437 copyplist(list, copycont, rpool) 438 char **list; 439 bool copycont; 440 SM_RPOOL_T *rpool; 441 { 442 register char **vp; 443 register char **newvp; 444 445 for (vp = list; *vp != NULL; vp++) 446 continue; 447 448 vp++; 449 450 newvp = (char **) sm_rpool_malloc_x(rpool, (vp - list) * sizeof *vp); 451 memmove((char *) newvp, (char *) list, (int) (vp - list) * sizeof *vp); 452 453 if (copycont) 454 { 455 for (vp = newvp; *vp != NULL; vp++) 456 *vp = sm_rpool_strdup_x(rpool, *vp); 457 } 458 459 return newvp; 460 } 461 /* 462 ** COPYQUEUE -- copy address queue. 463 ** 464 ** This routine is the equivalent of strdup for address queues; 465 ** addresses marked as QS_IS_DEAD() aren't copied 466 ** 467 ** Parameters: 468 ** addr -- list of address structures to copy. 469 ** rpool -- resource pool from which to allocate storage 470 ** 471 ** Returns: 472 ** a copy of 'addr'. 473 */ 474 475 ADDRESS * 476 copyqueue(addr, rpool) 477 ADDRESS *addr; 478 SM_RPOOL_T *rpool; 479 { 480 register ADDRESS *newaddr; 481 ADDRESS *ret; 482 register ADDRESS **tail = &ret; 483 484 while (addr != NULL) 485 { 486 if (!QS_IS_DEAD(addr->q_state)) 487 { 488 newaddr = (ADDRESS *) sm_rpool_malloc_x(rpool, 489 sizeof *newaddr); 490 STRUCTCOPY(*addr, *newaddr); 491 *tail = newaddr; 492 tail = &newaddr->q_next; 493 } 494 addr = addr->q_next; 495 } 496 *tail = NULL; 497 498 return ret; 499 } 500 /* 501 ** LOG_SENDMAIL_PID -- record sendmail pid and command line. 502 ** 503 ** Parameters: 504 ** e -- the current envelope. 505 ** 506 ** Returns: 507 ** none. 508 ** 509 ** Side Effects: 510 ** writes pidfile, logs command line. 511 */ 512 513 void 514 log_sendmail_pid(e) 515 ENVELOPE *e; 516 { 517 long sff; 518 SM_FILE_T *pidf; 519 char pidpath[MAXPATHLEN]; 520 extern char *CommandLineArgs; 521 522 /* write the pid to the log file for posterity */ 523 sff = SFF_NOLINK|SFF_ROOTOK|SFF_REGONLY|SFF_CREAT; 524 if (TrustedUid != 0 && RealUid == TrustedUid) 525 sff |= SFF_OPENASROOT; 526 expand(PidFile, pidpath, sizeof pidpath, e); 527 pidf = safefopen(pidpath, O_WRONLY|O_TRUNC, FileMode, sff); 528 if (pidf == NULL) 529 { 530 sm_syslog(LOG_ERR, NOQID, "unable to write %s: %s", 531 pidpath, sm_errstring(errno)); 532 } 533 else 534 { 535 pid_t pid; 536 537 pid = getpid(); 538 539 /* write the process id on line 1 */ 540 (void) sm_io_fprintf(pidf, SM_TIME_DEFAULT, "%ld\n", 541 (long) pid); 542 543 /* line 2 contains all command line flags */ 544 (void) sm_io_fprintf(pidf, SM_TIME_DEFAULT, "%s\n", 545 CommandLineArgs); 546 547 /* flush and close */ 548 (void) sm_io_close(pidf, SM_TIME_DEFAULT); 549 } 550 if (LogLevel > 9) 551 sm_syslog(LOG_INFO, NOQID, "started as: %s", CommandLineArgs); 552 } 553 /* 554 ** SET_DELIVERY_MODE -- set and record the delivery mode 555 ** 556 ** Parameters: 557 ** mode -- delivery mode 558 ** e -- the current envelope. 559 ** 560 ** Returns: 561 ** none. 562 ** 563 ** Side Effects: 564 ** sets {deliveryMode} macro 565 */ 566 567 void 568 set_delivery_mode(mode, e) 569 int mode; 570 ENVELOPE *e; 571 { 572 char buf[2]; 573 574 e->e_sendmode = (char) mode; 575 buf[0] = (char) mode; 576 buf[1] = '\0'; 577 macdefine(&e->e_macro, A_TEMP, macid("{deliveryMode}"), buf); 578 } 579 /* 580 ** SET_OP_MODE -- set and record the op mode 581 ** 582 ** Parameters: 583 ** mode -- op mode 584 ** e -- the current envelope. 585 ** 586 ** Returns: 587 ** none. 588 ** 589 ** Side Effects: 590 ** sets {opMode} macro 591 */ 592 593 void 594 set_op_mode(mode) 595 int mode; 596 { 597 char buf[2]; 598 extern ENVELOPE BlankEnvelope; 599 600 OpMode = (char) mode; 601 buf[0] = (char) mode; 602 buf[1] = '\0'; 603 macdefine(&BlankEnvelope.e_macro, A_TEMP, MID_OPMODE, buf); 604 } 605 /* 606 ** PRINTAV -- print argument vector. 607 ** 608 ** Parameters: 609 ** av -- argument vector. 610 ** 611 ** Returns: 612 ** none. 613 ** 614 ** Side Effects: 615 ** prints av. 616 */ 617 618 void 619 printav(av) 620 register char **av; 621 { 622 while (*av != NULL) 623 { 624 if (tTd(0, 44)) 625 sm_dprintf("\n\t%08lx=", (unsigned long) *av); 626 else 627 (void) sm_io_putc(smioout, SM_TIME_DEFAULT, ' '); 628 xputs(*av++); 629 } 630 (void) sm_io_putc(smioout, SM_TIME_DEFAULT, '\n'); 631 } 632 /* 633 ** XPUTS -- put string doing control escapes. 634 ** 635 ** Parameters: 636 ** s -- string to put. 637 ** 638 ** Returns: 639 ** none. 640 ** 641 ** Side Effects: 642 ** output to stdout 643 */ 644 645 void 646 xputs(s) 647 register const char *s; 648 { 649 register int c; 650 register struct metamac *mp; 651 bool shiftout = false; 652 extern struct metamac MetaMacros[]; 653 static SM_DEBUG_T DebugANSI = SM_DEBUG_INITIALIZER("ANSI", 654 "@(#)$Debug: ANSI - enable reverse video in debug output $"); 655 656 /* 657 ** TermEscape is set here, rather than in main(), 658 ** because ANSI mode can be turned on or off at any time 659 ** if we are in -bt rule testing mode. 660 */ 661 662 if (sm_debug_unknown(&DebugANSI)) 663 { 664 if (sm_debug_active(&DebugANSI, 1)) 665 { 666 TermEscape.te_rv_on = "\033[7m"; 667 TermEscape.te_rv_off = "\033[0m"; 668 } 669 else 670 { 671 TermEscape.te_rv_on = ""; 672 TermEscape.te_rv_off = ""; 673 } 674 } 675 676 if (s == NULL) 677 { 678 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%s<null>%s", 679 TermEscape.te_rv_on, TermEscape.te_rv_off); 680 return; 681 } 682 while ((c = (*s++ & 0377)) != '\0') 683 { 684 if (shiftout) 685 { 686 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%s", 687 TermEscape.te_rv_off); 688 shiftout = false; 689 } 690 if (!isascii(c)) 691 { 692 if (c == MATCHREPL) 693 { 694 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, 695 "%s$", 696 TermEscape.te_rv_on); 697 shiftout = true; 698 if (*s == '\0') 699 continue; 700 c = *s++ & 0377; 701 goto printchar; 702 } 703 if (c == MACROEXPAND || c == MACRODEXPAND) 704 { 705 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, 706 "%s$", 707 TermEscape.te_rv_on); 708 if (c == MACRODEXPAND) 709 (void) sm_io_putc(smioout, 710 SM_TIME_DEFAULT, '&'); 711 shiftout = true; 712 if (*s == '\0') 713 continue; 714 if (strchr("=~&?", *s) != NULL) 715 (void) sm_io_putc(smioout, 716 SM_TIME_DEFAULT, 717 *s++); 718 if (bitset(0200, *s)) 719 (void) sm_io_fprintf(smioout, 720 SM_TIME_DEFAULT, 721 "{%s}", 722 macname(bitidx(*s++))); 723 else 724 (void) sm_io_fprintf(smioout, 725 SM_TIME_DEFAULT, 726 "%c", 727 *s++); 728 continue; 729 } 730 for (mp = MetaMacros; mp->metaname != '\0'; mp++) 731 { 732 if (bitidx(mp->metaval) == c) 733 { 734 (void) sm_io_fprintf(smioout, 735 SM_TIME_DEFAULT, 736 "%s$%c", 737 TermEscape.te_rv_on, 738 mp->metaname); 739 shiftout = true; 740 break; 741 } 742 } 743 if (c == MATCHCLASS || c == MATCHNCLASS) 744 { 745 if (bitset(0200, *s)) 746 (void) sm_io_fprintf(smioout, 747 SM_TIME_DEFAULT, 748 "{%s}", 749 macname(bitidx(*s++))); 750 else if (*s != '\0') 751 (void) sm_io_fprintf(smioout, 752 SM_TIME_DEFAULT, 753 "%c", 754 *s++); 755 } 756 if (mp->metaname != '\0') 757 continue; 758 759 /* unrecognized meta character */ 760 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%sM-", 761 TermEscape.te_rv_on); 762 shiftout = true; 763 c &= 0177; 764 } 765 printchar: 766 if (isprint(c)) 767 { 768 (void) sm_io_putc(smioout, SM_TIME_DEFAULT, c); 769 continue; 770 } 771 772 /* wasn't a meta-macro -- find another way to print it */ 773 switch (c) 774 { 775 case '\n': 776 c = 'n'; 777 break; 778 779 case '\r': 780 c = 'r'; 781 break; 782 783 case '\t': 784 c = 't'; 785 break; 786 } 787 if (!shiftout) 788 { 789 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%s", 790 TermEscape.te_rv_on); 791 shiftout = true; 792 } 793 if (isprint(c)) 794 { 795 (void) sm_io_putc(smioout, SM_TIME_DEFAULT, '\\'); 796 (void) sm_io_putc(smioout, SM_TIME_DEFAULT, c); 797 } 798 else 799 { 800 (void) sm_io_putc(smioout, SM_TIME_DEFAULT, '^'); 801 (void) sm_io_putc(smioout, SM_TIME_DEFAULT, c ^ 0100); 802 } 803 } 804 if (shiftout) 805 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%s", 806 TermEscape.te_rv_off); 807 (void) sm_io_flush(smioout, SM_TIME_DEFAULT); 808 } 809 /* 810 ** MAKELOWER -- Translate a line into lower case 811 ** 812 ** Parameters: 813 ** p -- the string to translate. If NULL, return is 814 ** immediate. 815 ** 816 ** Returns: 817 ** none. 818 ** 819 ** Side Effects: 820 ** String pointed to by p is translated to lower case. 821 */ 822 823 void 824 makelower(p) 825 register char *p; 826 { 827 register char c; 828 829 if (p == NULL) 830 return; 831 for (; (c = *p) != '\0'; p++) 832 if (isascii(c) && isupper(c)) 833 *p = tolower(c); 834 } 835 /* 836 ** FIXCRLF -- fix <CR><LF> in line. 837 ** 838 ** Looks for the <CR><LF> combination and turns it into the 839 ** UNIX canonical <NL> character. It only takes one line, 840 ** i.e., it is assumed that the first <NL> found is the end 841 ** of the line. 842 ** 843 ** Parameters: 844 ** line -- the line to fix. 845 ** stripnl -- if true, strip the newline also. 846 ** 847 ** Returns: 848 ** none. 849 ** 850 ** Side Effects: 851 ** line is changed in place. 852 */ 853 854 void 855 fixcrlf(line, stripnl) 856 char *line; 857 bool stripnl; 858 { 859 register char *p; 860 861 p = strchr(line, '\n'); 862 if (p == NULL) 863 return; 864 if (p > line && p[-1] == '\r') 865 p--; 866 if (!stripnl) 867 *p++ = '\n'; 868 *p = '\0'; 869 } 870 /* 871 ** PUTLINE -- put a line like fputs obeying SMTP conventions 872 ** 873 ** This routine always guarantees outputing a newline (or CRLF, 874 ** as appropriate) at the end of the string. 875 ** 876 ** Parameters: 877 ** l -- line to put. 878 ** mci -- the mailer connection information. 879 ** 880 ** Returns: 881 ** none 882 ** 883 ** Side Effects: 884 ** output of l to mci->mci_out. 885 */ 886 887 void 888 putline(l, mci) 889 register char *l; 890 register MCI *mci; 891 { 892 putxline(l, strlen(l), mci, PXLF_MAPFROM); 893 } 894 /* 895 ** PUTXLINE -- putline with flags bits. 896 ** 897 ** This routine always guarantees outputing a newline (or CRLF, 898 ** as appropriate) at the end of the string. 899 ** 900 ** Parameters: 901 ** l -- line to put. 902 ** len -- the length of the line. 903 ** mci -- the mailer connection information. 904 ** pxflags -- flag bits: 905 ** PXLF_MAPFROM -- map From_ to >From_. 906 ** PXLF_STRIP8BIT -- strip 8th bit. 907 ** PXLF_HEADER -- map bare newline in header to newline space. 908 ** PXLF_NOADDEOL -- don't add an EOL if one wasn't present. 909 ** 910 ** Returns: 911 ** none 912 ** 913 ** Side Effects: 914 ** output of l to mci->mci_out. 915 */ 916 917 void 918 putxline(l, len, mci, pxflags) 919 register char *l; 920 size_t len; 921 register MCI *mci; 922 int pxflags; 923 { 924 bool dead = false; 925 register char *p, *end; 926 int slop = 0; 927 928 /* strip out 0200 bits -- these can look like TELNET protocol */ 929 if (bitset(MCIF_7BIT, mci->mci_flags) || 930 bitset(PXLF_STRIP8BIT, pxflags)) 931 { 932 register char svchar; 933 934 for (p = l; (svchar = *p) != '\0'; ++p) 935 if (bitset(0200, svchar)) 936 *p = svchar &~ 0200; 937 } 938 939 end = l + len; 940 do 941 { 942 bool noeol = false; 943 944 /* find the end of the line */ 945 p = memchr(l, '\n', end - l); 946 if (p == NULL) 947 { 948 p = end; 949 noeol = true; 950 } 951 952 if (TrafficLogFile != NULL) 953 (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT, 954 "%05d >>> ", (int) CurrentPid); 955 956 /* check for line overflow */ 957 while (mci->mci_mailer->m_linelimit > 0 && 958 (p - l + slop) > mci->mci_mailer->m_linelimit) 959 { 960 char *l_base = l; 961 register char *q = &l[mci->mci_mailer->m_linelimit - slop - 1]; 962 963 if (l[0] == '.' && slop == 0 && 964 bitnset(M_XDOT, mci->mci_mailer->m_flags)) 965 { 966 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, 967 '.') == SM_IO_EOF) 968 dead = true; 969 else 970 { 971 /* record progress for DATA timeout */ 972 DataProgress = true; 973 } 974 if (TrafficLogFile != NULL) 975 (void) sm_io_putc(TrafficLogFile, 976 SM_TIME_DEFAULT, '.'); 977 } 978 else if (l[0] == 'F' && slop == 0 && 979 bitset(PXLF_MAPFROM, pxflags) && 980 strncmp(l, "From ", 5) == 0 && 981 bitnset(M_ESCFROM, mci->mci_mailer->m_flags)) 982 { 983 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, 984 '>') == SM_IO_EOF) 985 dead = true; 986 else 987 { 988 /* record progress for DATA timeout */ 989 DataProgress = true; 990 } 991 if (TrafficLogFile != NULL) 992 (void) sm_io_putc(TrafficLogFile, 993 SM_TIME_DEFAULT, 994 '>'); 995 } 996 if (dead) 997 break; 998 999 while (l < q) 1000 { 1001 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, 1002 (unsigned char) *l++) == SM_IO_EOF) 1003 { 1004 dead = true; 1005 break; 1006 } 1007 else 1008 { 1009 /* record progress for DATA timeout */ 1010 DataProgress = true; 1011 } 1012 } 1013 if (dead) 1014 break; 1015 1016 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, '!') == 1017 SM_IO_EOF || 1018 sm_io_fputs(mci->mci_out, SM_TIME_DEFAULT, 1019 mci->mci_mailer->m_eol) == 1020 SM_IO_EOF || 1021 sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, ' ') == 1022 SM_IO_EOF) 1023 { 1024 dead = true; 1025 break; 1026 } 1027 else 1028 { 1029 /* record progress for DATA timeout */ 1030 DataProgress = true; 1031 } 1032 if (TrafficLogFile != NULL) 1033 { 1034 for (l = l_base; l < q; l++) 1035 (void) sm_io_putc(TrafficLogFile, 1036 SM_TIME_DEFAULT, 1037 (unsigned char)*l); 1038 (void) sm_io_fprintf(TrafficLogFile, 1039 SM_TIME_DEFAULT, 1040 "!\n%05d >>> ", 1041 (int) CurrentPid); 1042 } 1043 slop = 1; 1044 } 1045 1046 if (dead) 1047 break; 1048 1049 /* output last part */ 1050 if (l[0] == '.' && slop == 0 && 1051 bitnset(M_XDOT, mci->mci_mailer->m_flags)) 1052 { 1053 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, '.') == 1054 SM_IO_EOF) 1055 break; 1056 else 1057 { 1058 /* record progress for DATA timeout */ 1059 DataProgress = true; 1060 } 1061 if (TrafficLogFile != NULL) 1062 (void) sm_io_putc(TrafficLogFile, 1063 SM_TIME_DEFAULT, '.'); 1064 } 1065 else if (l[0] == 'F' && slop == 0 && 1066 bitset(PXLF_MAPFROM, pxflags) && 1067 strncmp(l, "From ", 5) == 0 && 1068 bitnset(M_ESCFROM, mci->mci_mailer->m_flags)) 1069 { 1070 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, '>') == 1071 SM_IO_EOF) 1072 break; 1073 else 1074 { 1075 /* record progress for DATA timeout */ 1076 DataProgress = true; 1077 } 1078 if (TrafficLogFile != NULL) 1079 (void) sm_io_putc(TrafficLogFile, 1080 SM_TIME_DEFAULT, '>'); 1081 } 1082 for ( ; l < p; ++l) 1083 { 1084 if (TrafficLogFile != NULL) 1085 (void) sm_io_putc(TrafficLogFile, 1086 SM_TIME_DEFAULT, 1087 (unsigned char)*l); 1088 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, 1089 (unsigned char) *l) == SM_IO_EOF) 1090 { 1091 dead = true; 1092 break; 1093 } 1094 else 1095 { 1096 /* record progress for DATA timeout */ 1097 DataProgress = true; 1098 } 1099 } 1100 if (dead) 1101 break; 1102 1103 if (TrafficLogFile != NULL) 1104 (void) sm_io_putc(TrafficLogFile, SM_TIME_DEFAULT, 1105 '\n'); 1106 if ((!bitset(PXLF_NOADDEOL, pxflags) || !noeol) && 1107 sm_io_fputs(mci->mci_out, SM_TIME_DEFAULT, 1108 mci->mci_mailer->m_eol) == SM_IO_EOF) 1109 break; 1110 else 1111 { 1112 /* record progress for DATA timeout */ 1113 DataProgress = true; 1114 } 1115 if (l < end && *l == '\n') 1116 { 1117 if (*++l != ' ' && *l != '\t' && *l != '\0' && 1118 bitset(PXLF_HEADER, pxflags)) 1119 { 1120 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, 1121 ' ') == SM_IO_EOF) 1122 break; 1123 else 1124 { 1125 /* record progress for DATA timeout */ 1126 DataProgress = true; 1127 } 1128 1129 if (TrafficLogFile != NULL) 1130 (void) sm_io_putc(TrafficLogFile, 1131 SM_TIME_DEFAULT, ' '); 1132 } 1133 } 1134 1135 /* record progress for DATA timeout */ 1136 DataProgress = true; 1137 } while (l < end); 1138 } 1139 /* 1140 ** XUNLINK -- unlink a file, doing logging as appropriate. 1141 ** 1142 ** Parameters: 1143 ** f -- name of file to unlink. 1144 ** 1145 ** Returns: 1146 ** return value of unlink() 1147 ** 1148 ** Side Effects: 1149 ** f is unlinked. 1150 */ 1151 1152 int 1153 xunlink(f) 1154 char *f; 1155 { 1156 register int i; 1157 int save_errno; 1158 1159 if (LogLevel > 98) 1160 sm_syslog(LOG_DEBUG, CurEnv->e_id, "unlink %s", f); 1161 1162 i = unlink(f); 1163 save_errno = errno; 1164 if (i < 0 && LogLevel > 97) 1165 sm_syslog(LOG_DEBUG, CurEnv->e_id, "%s: unlink-fail %d", 1166 f, errno); 1167 if (i >= 0) 1168 SYNC_DIR(f, false); 1169 errno = save_errno; 1170 return i; 1171 } 1172 /* 1173 ** SFGETS -- "safe" fgets -- times out and ignores random interrupts. 1174 ** 1175 ** Parameters: 1176 ** buf -- place to put the input line. 1177 ** siz -- size of buf. 1178 ** fp -- file to read from. 1179 ** timeout -- the timeout before error occurs. 1180 ** during -- what we are trying to read (for error messages). 1181 ** 1182 ** Returns: 1183 ** NULL on error (including timeout). This may also leave 1184 ** buf containing a null string. 1185 ** buf otherwise. 1186 */ 1187 1188 1189 char * 1190 sfgets(buf, siz, fp, timeout, during) 1191 char *buf; 1192 int siz; 1193 SM_FILE_T *fp; 1194 time_t timeout; 1195 char *during; 1196 { 1197 register char *p; 1198 int save_errno; 1199 int io_timeout; 1200 1201 SM_REQUIRE(siz > 0); 1202 SM_REQUIRE(buf != NULL); 1203 1204 if (fp == NULL) 1205 { 1206 buf[0] = '\0'; 1207 errno = EBADF; 1208 return NULL; 1209 } 1210 1211 /* try to read */ 1212 p = NULL; 1213 errno = 0; 1214 1215 /* convert the timeout to sm_io notation */ 1216 io_timeout = (timeout <= 0) ? SM_TIME_DEFAULT : timeout * 1000; 1217 while (!sm_io_eof(fp) && !sm_io_error(fp)) 1218 { 1219 errno = 0; 1220 p = sm_io_fgets(fp, io_timeout, buf, siz); 1221 if (p == NULL && errno == EAGAIN) 1222 { 1223 /* The sm_io_fgets() call timedout */ 1224 if (LogLevel > 1) 1225 sm_syslog(LOG_NOTICE, CurEnv->e_id, 1226 "timeout waiting for input from %.100s during %s", 1227 CURHOSTNAME, 1228 during); 1229 buf[0] = '\0'; 1230 #if XDEBUG 1231 checkfd012(during); 1232 #endif /* XDEBUG */ 1233 if (TrafficLogFile != NULL) 1234 (void) sm_io_fprintf(TrafficLogFile, 1235 SM_TIME_DEFAULT, 1236 "%05d <<< [TIMEOUT]\n", 1237 (int) CurrentPid); 1238 errno = ETIMEDOUT; 1239 return NULL; 1240 } 1241 if (p != NULL || errno != EINTR) 1242 break; 1243 (void) sm_io_clearerr(fp); 1244 } 1245 save_errno = errno; 1246 1247 /* clean up the books and exit */ 1248 LineNumber++; 1249 if (p == NULL) 1250 { 1251 buf[0] = '\0'; 1252 if (TrafficLogFile != NULL) 1253 (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT, 1254 "%05d <<< [EOF]\n", 1255 (int) CurrentPid); 1256 errno = save_errno; 1257 return NULL; 1258 } 1259 if (TrafficLogFile != NULL) 1260 (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT, 1261 "%05d <<< %s", (int) CurrentPid, buf); 1262 if (SevenBitInput) 1263 { 1264 for (p = buf; *p != '\0'; p++) 1265 *p &= ~0200; 1266 } 1267 else if (!HasEightBits) 1268 { 1269 for (p = buf; *p != '\0'; p++) 1270 { 1271 if (bitset(0200, *p)) 1272 { 1273 HasEightBits = true; 1274 break; 1275 } 1276 } 1277 } 1278 return buf; 1279 } 1280 /* 1281 ** FGETFOLDED -- like fgets, but knows about folded lines. 1282 ** 1283 ** Parameters: 1284 ** buf -- place to put result. 1285 ** n -- bytes available. 1286 ** f -- file to read from. 1287 ** 1288 ** Returns: 1289 ** input line(s) on success, NULL on error or SM_IO_EOF. 1290 ** This will normally be buf -- unless the line is too 1291 ** long, when it will be sm_malloc_x()ed. 1292 ** 1293 ** Side Effects: 1294 ** buf gets lines from f, with continuation lines (lines 1295 ** with leading white space) appended. CRLF's are mapped 1296 ** into single newlines. Any trailing NL is stripped. 1297 */ 1298 1299 char * 1300 fgetfolded(buf, n, f) 1301 char *buf; 1302 register int n; 1303 SM_FILE_T *f; 1304 { 1305 register char *p = buf; 1306 char *bp = buf; 1307 register int i; 1308 1309 SM_REQUIRE(n > 0); 1310 SM_REQUIRE(buf != NULL); 1311 if (f == NULL) 1312 { 1313 buf[0] = '\0'; 1314 errno = EBADF; 1315 return NULL; 1316 } 1317 1318 n--; 1319 while ((i = sm_io_getc(f, SM_TIME_DEFAULT)) != SM_IO_EOF) 1320 { 1321 if (i == '\r') 1322 { 1323 i = sm_io_getc(f, SM_TIME_DEFAULT); 1324 if (i != '\n') 1325 { 1326 if (i != SM_IO_EOF) 1327 (void) sm_io_ungetc(f, SM_TIME_DEFAULT, 1328 i); 1329 i = '\r'; 1330 } 1331 } 1332 if (--n <= 0) 1333 { 1334 /* allocate new space */ 1335 char *nbp; 1336 int nn; 1337 1338 nn = (p - bp); 1339 if (nn < MEMCHUNKSIZE) 1340 nn *= 2; 1341 else 1342 nn += MEMCHUNKSIZE; 1343 nbp = sm_malloc_x(nn); 1344 memmove(nbp, bp, p - bp); 1345 p = &nbp[p - bp]; 1346 if (bp != buf) 1347 sm_free(bp); 1348 bp = nbp; 1349 n = nn - (p - bp); 1350 } 1351 *p++ = i; 1352 if (i == '\n') 1353 { 1354 LineNumber++; 1355 i = sm_io_getc(f, SM_TIME_DEFAULT); 1356 if (i != SM_IO_EOF) 1357 (void) sm_io_ungetc(f, SM_TIME_DEFAULT, i); 1358 if (i != ' ' && i != '\t') 1359 break; 1360 } 1361 } 1362 if (p == bp) 1363 return NULL; 1364 if (p[-1] == '\n') 1365 p--; 1366 *p = '\0'; 1367 return bp; 1368 } 1369 /* 1370 ** CURTIME -- return current time. 1371 ** 1372 ** Parameters: 1373 ** none. 1374 ** 1375 ** Returns: 1376 ** the current time. 1377 */ 1378 1379 time_t 1380 curtime() 1381 { 1382 auto time_t t; 1383 1384 (void) time(&t); 1385 return t; 1386 } 1387 /* 1388 ** ATOBOOL -- convert a string representation to boolean. 1389 ** 1390 ** Defaults to false 1391 ** 1392 ** Parameters: 1393 ** s -- string to convert. Takes "tTyY", empty, and NULL as true, 1394 ** others as false. 1395 ** 1396 ** Returns: 1397 ** A boolean representation of the string. 1398 */ 1399 1400 bool 1401 atobool(s) 1402 register char *s; 1403 { 1404 if (s == NULL || *s == '\0' || strchr("tTyY", *s) != NULL) 1405 return true; 1406 return false; 1407 } 1408 /* 1409 ** ATOOCT -- convert a string representation to octal. 1410 ** 1411 ** Parameters: 1412 ** s -- string to convert. 1413 ** 1414 ** Returns: 1415 ** An integer representing the string interpreted as an 1416 ** octal number. 1417 */ 1418 1419 int 1420 atooct(s) 1421 register char *s; 1422 { 1423 register int i = 0; 1424 1425 while (*s >= '0' && *s <= '7') 1426 i = (i << 3) | (*s++ - '0'); 1427 return i; 1428 } 1429 /* 1430 ** BITINTERSECT -- tell if two bitmaps intersect 1431 ** 1432 ** Parameters: 1433 ** a, b -- the bitmaps in question 1434 ** 1435 ** Returns: 1436 ** true if they have a non-null intersection 1437 ** false otherwise 1438 */ 1439 1440 bool 1441 bitintersect(a, b) 1442 BITMAP256 a; 1443 BITMAP256 b; 1444 { 1445 int i; 1446 1447 for (i = BITMAPBYTES / sizeof (int); --i >= 0; ) 1448 { 1449 if ((a[i] & b[i]) != 0) 1450 return true; 1451 } 1452 return false; 1453 } 1454 /* 1455 ** BITZEROP -- tell if a bitmap is all zero 1456 ** 1457 ** Parameters: 1458 ** map -- the bit map to check 1459 ** 1460 ** Returns: 1461 ** true if map is all zero. 1462 ** false if there are any bits set in map. 1463 */ 1464 1465 bool 1466 bitzerop(map) 1467 BITMAP256 map; 1468 { 1469 int i; 1470 1471 for (i = BITMAPBYTES / sizeof (int); --i >= 0; ) 1472 { 1473 if (map[i] != 0) 1474 return false; 1475 } 1476 return true; 1477 } 1478 /* 1479 ** STRCONTAINEDIN -- tell if one string is contained in another 1480 ** 1481 ** Parameters: 1482 ** icase -- ignore case? 1483 ** a -- possible substring. 1484 ** b -- possible superstring. 1485 ** 1486 ** Returns: 1487 ** true if a is contained in b (case insensitive). 1488 ** false otherwise. 1489 */ 1490 1491 bool 1492 strcontainedin(icase, a, b) 1493 bool icase; 1494 register char *a; 1495 register char *b; 1496 { 1497 int la; 1498 int lb; 1499 int c; 1500 1501 la = strlen(a); 1502 lb = strlen(b); 1503 c = *a; 1504 if (icase && isascii(c) && isupper(c)) 1505 c = tolower(c); 1506 for (; lb-- >= la; b++) 1507 { 1508 if (icase) 1509 { 1510 if (*b != c && 1511 isascii(*b) && isupper(*b) && tolower(*b) != c) 1512 continue; 1513 if (sm_strncasecmp(a, b, la) == 0) 1514 return true; 1515 } 1516 else 1517 { 1518 if (*b != c) 1519 continue; 1520 if (strncmp(a, b, la) == 0) 1521 return true; 1522 } 1523 } 1524 return false; 1525 } 1526 /* 1527 ** CHECKFD012 -- check low numbered file descriptors 1528 ** 1529 ** File descriptors 0, 1, and 2 should be open at all times. 1530 ** This routine verifies that, and fixes it if not true. 1531 ** 1532 ** Parameters: 1533 ** where -- a tag printed if the assertion failed 1534 ** 1535 ** Returns: 1536 ** none 1537 */ 1538 1539 void 1540 checkfd012(where) 1541 char *where; 1542 { 1543 #if XDEBUG 1544 register int i; 1545 1546 for (i = 0; i < 3; i++) 1547 fill_fd(i, where); 1548 #endif /* XDEBUG */ 1549 } 1550 /* 1551 ** CHECKFDOPEN -- make sure file descriptor is open -- for extended debugging 1552 ** 1553 ** Parameters: 1554 ** fd -- file descriptor to check. 1555 ** where -- tag to print on failure. 1556 ** 1557 ** Returns: 1558 ** none. 1559 */ 1560 1561 void 1562 checkfdopen(fd, where) 1563 int fd; 1564 char *where; 1565 { 1566 #if XDEBUG 1567 struct stat st; 1568 1569 if (fstat(fd, &st) < 0 && errno == EBADF) 1570 { 1571 syserr("checkfdopen(%d): %s not open as expected!", fd, where); 1572 printopenfds(true); 1573 } 1574 #endif /* XDEBUG */ 1575 } 1576 /* 1577 ** CHECKFDS -- check for new or missing file descriptors 1578 ** 1579 ** Parameters: 1580 ** where -- tag for printing. If null, take a base line. 1581 ** 1582 ** Returns: 1583 ** none 1584 ** 1585 ** Side Effects: 1586 ** If where is set, shows changes since the last call. 1587 */ 1588 1589 void 1590 checkfds(where) 1591 char *where; 1592 { 1593 int maxfd; 1594 register int fd; 1595 bool printhdr = true; 1596 int save_errno = errno; 1597 static BITMAP256 baseline; 1598 extern int DtableSize; 1599 1600 if (DtableSize > BITMAPBITS) 1601 maxfd = BITMAPBITS; 1602 else 1603 maxfd = DtableSize; 1604 if (where == NULL) 1605 clrbitmap(baseline); 1606 1607 for (fd = 0; fd < maxfd; fd++) 1608 { 1609 struct stat stbuf; 1610 1611 if (fstat(fd, &stbuf) < 0 && errno != EOPNOTSUPP) 1612 { 1613 if (!bitnset(fd, baseline)) 1614 continue; 1615 clrbitn(fd, baseline); 1616 } 1617 else if (!bitnset(fd, baseline)) 1618 setbitn(fd, baseline); 1619 else 1620 continue; 1621 1622 /* file state has changed */ 1623 if (where == NULL) 1624 continue; 1625 if (printhdr) 1626 { 1627 sm_syslog(LOG_DEBUG, CurEnv->e_id, 1628 "%s: changed fds:", 1629 where); 1630 printhdr = false; 1631 } 1632 dumpfd(fd, true, true); 1633 } 1634 errno = save_errno; 1635 } 1636 /* 1637 ** PRINTOPENFDS -- print the open file descriptors (for debugging) 1638 ** 1639 ** Parameters: 1640 ** logit -- if set, send output to syslog; otherwise 1641 ** print for debugging. 1642 ** 1643 ** Returns: 1644 ** none. 1645 */ 1646 1647 #if NETINET || NETINET6 1648 # include <arpa/inet.h> 1649 #endif /* NETINET || NETINET6 */ 1650 1651 void 1652 printopenfds(logit) 1653 bool logit; 1654 { 1655 register int fd; 1656 extern int DtableSize; 1657 1658 for (fd = 0; fd < DtableSize; fd++) 1659 dumpfd(fd, false, logit); 1660 } 1661 /* 1662 ** DUMPFD -- dump a file descriptor 1663 ** 1664 ** Parameters: 1665 ** fd -- the file descriptor to dump. 1666 ** printclosed -- if set, print a notification even if 1667 ** it is closed; otherwise print nothing. 1668 ** logit -- if set, send output to syslog instead of stdout. 1669 ** 1670 ** Returns: 1671 ** none. 1672 */ 1673 1674 void 1675 dumpfd(fd, printclosed, logit) 1676 int fd; 1677 bool printclosed; 1678 bool logit; 1679 { 1680 register char *p; 1681 char *hp; 1682 #ifdef S_IFSOCK 1683 SOCKADDR sa; 1684 #endif /* S_IFSOCK */ 1685 auto SOCKADDR_LEN_T slen; 1686 int i; 1687 #if STAT64 > 0 1688 struct stat64 st; 1689 #else /* STAT64 > 0 */ 1690 struct stat st; 1691 #endif /* STAT64 > 0 */ 1692 char buf[200]; 1693 1694 p = buf; 1695 (void) sm_snprintf(p, SPACELEFT(buf, p), "%3d: ", fd); 1696 p += strlen(p); 1697 1698 if ( 1699 #if STAT64 > 0 1700 fstat64(fd, &st) 1701 #else /* STAT64 > 0 */ 1702 fstat(fd, &st) 1703 #endif /* STAT64 > 0 */ 1704 < 0) 1705 { 1706 if (errno != EBADF) 1707 { 1708 (void) sm_snprintf(p, SPACELEFT(buf, p), 1709 "CANNOT STAT (%s)", 1710 sm_errstring(errno)); 1711 goto printit; 1712 } 1713 else if (printclosed) 1714 { 1715 (void) sm_snprintf(p, SPACELEFT(buf, p), "CLOSED"); 1716 goto printit; 1717 } 1718 return; 1719 } 1720 1721 i = fcntl(fd, F_GETFL, 0); 1722 if (i != -1) 1723 { 1724 (void) sm_snprintf(p, SPACELEFT(buf, p), "fl=0x%x, ", i); 1725 p += strlen(p); 1726 } 1727 1728 (void) sm_snprintf(p, SPACELEFT(buf, p), "mode=%o: ", 1729 (int) st.st_mode); 1730 p += strlen(p); 1731 switch (st.st_mode & S_IFMT) 1732 { 1733 #ifdef S_IFSOCK 1734 case S_IFSOCK: 1735 (void) sm_snprintf(p, SPACELEFT(buf, p), "SOCK "); 1736 p += strlen(p); 1737 memset(&sa, '\0', sizeof sa); 1738 slen = sizeof sa; 1739 if (getsockname(fd, &sa.sa, &slen) < 0) 1740 (void) sm_snprintf(p, SPACELEFT(buf, p), "(%s)", 1741 sm_errstring(errno)); 1742 else 1743 { 1744 hp = hostnamebyanyaddr(&sa); 1745 if (hp == NULL) 1746 { 1747 /* EMPTY */ 1748 /* do nothing */ 1749 } 1750 # if NETINET 1751 else if (sa.sa.sa_family == AF_INET) 1752 (void) sm_snprintf(p, SPACELEFT(buf, p), 1753 "%s/%d", hp, ntohs(sa.sin.sin_port)); 1754 # endif /* NETINET */ 1755 # if NETINET6 1756 else if (sa.sa.sa_family == AF_INET6) 1757 (void) sm_snprintf(p, SPACELEFT(buf, p), 1758 "%s/%d", hp, ntohs(sa.sin6.sin6_port)); 1759 # endif /* NETINET6 */ 1760 else 1761 (void) sm_snprintf(p, SPACELEFT(buf, p), 1762 "%s", hp); 1763 } 1764 p += strlen(p); 1765 (void) sm_snprintf(p, SPACELEFT(buf, p), "->"); 1766 p += strlen(p); 1767 slen = sizeof sa; 1768 if (getpeername(fd, &sa.sa, &slen) < 0) 1769 (void) sm_snprintf(p, SPACELEFT(buf, p), "(%s)", 1770 sm_errstring(errno)); 1771 else 1772 { 1773 hp = hostnamebyanyaddr(&sa); 1774 if (hp == NULL) 1775 { 1776 /* EMPTY */ 1777 /* do nothing */ 1778 } 1779 # if NETINET 1780 else if (sa.sa.sa_family == AF_INET) 1781 (void) sm_snprintf(p, SPACELEFT(buf, p), 1782 "%s/%d", hp, ntohs(sa.sin.sin_port)); 1783 # endif /* NETINET */ 1784 # if NETINET6 1785 else if (sa.sa.sa_family == AF_INET6) 1786 (void) sm_snprintf(p, SPACELEFT(buf, p), 1787 "%s/%d", hp, ntohs(sa.sin6.sin6_port)); 1788 # endif /* NETINET6 */ 1789 else 1790 (void) sm_snprintf(p, SPACELEFT(buf, p), 1791 "%s", hp); 1792 } 1793 break; 1794 #endif /* S_IFSOCK */ 1795 1796 case S_IFCHR: 1797 (void) sm_snprintf(p, SPACELEFT(buf, p), "CHR: "); 1798 p += strlen(p); 1799 goto defprint; 1800 1801 #ifdef S_IFBLK 1802 case S_IFBLK: 1803 (void) sm_snprintf(p, SPACELEFT(buf, p), "BLK: "); 1804 p += strlen(p); 1805 goto defprint; 1806 #endif /* S_IFBLK */ 1807 1808 #if defined(S_IFIFO) && (!defined(S_IFSOCK) || S_IFIFO != S_IFSOCK) 1809 case S_IFIFO: 1810 (void) sm_snprintf(p, SPACELEFT(buf, p), "FIFO: "); 1811 p += strlen(p); 1812 goto defprint; 1813 #endif /* defined(S_IFIFO) && (!defined(S_IFSOCK) || S_IFIFO != S_IFSOCK) */ 1814 1815 #ifdef S_IFDIR 1816 case S_IFDIR: 1817 (void) sm_snprintf(p, SPACELEFT(buf, p), "DIR: "); 1818 p += strlen(p); 1819 goto defprint; 1820 #endif /* S_IFDIR */ 1821 1822 #ifdef S_IFLNK 1823 case S_IFLNK: 1824 (void) sm_snprintf(p, SPACELEFT(buf, p), "LNK: "); 1825 p += strlen(p); 1826 goto defprint; 1827 #endif /* S_IFLNK */ 1828 1829 default: 1830 defprint: 1831 (void) sm_snprintf(p, SPACELEFT(buf, p), 1832 "dev=%d/%d, ino=%llu, nlink=%d, u/gid=%d/%d, ", 1833 major(st.st_dev), minor(st.st_dev), 1834 (ULONGLONG_T) st.st_ino, 1835 (int) st.st_nlink, (int) st.st_uid, 1836 (int) st.st_gid); 1837 p += strlen(p); 1838 (void) sm_snprintf(p, SPACELEFT(buf, p), "size=%llu", 1839 (ULONGLONG_T) st.st_size); 1840 break; 1841 } 1842 1843 printit: 1844 if (logit) 1845 sm_syslog(LOG_DEBUG, CurEnv ? CurEnv->e_id : NULL, 1846 "%.800s", buf); 1847 else 1848 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT, "%s\n", buf); 1849 } 1850 /* 1851 ** SHORTEN_HOSTNAME -- strip local domain information off of hostname. 1852 ** 1853 ** Parameters: 1854 ** host -- the host to shorten (stripped in place). 1855 ** 1856 ** Returns: 1857 ** place where string was truncated, NULL if not truncated. 1858 */ 1859 1860 char * 1861 shorten_hostname(host) 1862 char host[]; 1863 { 1864 register char *p; 1865 char *mydom; 1866 int i; 1867 bool canon = false; 1868 1869 /* strip off final dot */ 1870 i = strlen(host); 1871 p = &host[(i == 0) ? 0 : i - 1]; 1872 if (*p == '.') 1873 { 1874 *p = '\0'; 1875 canon = true; 1876 } 1877 1878 /* see if there is any domain at all -- if not, we are done */ 1879 p = strchr(host, '.'); 1880 if (p == NULL) 1881 return NULL; 1882 1883 /* yes, we have a domain -- see if it looks like us */ 1884 mydom = macvalue('m', CurEnv); 1885 if (mydom == NULL) 1886 mydom = ""; 1887 i = strlen(++p); 1888 if ((canon ? sm_strcasecmp(p, mydom) 1889 : sm_strncasecmp(p, mydom, i)) == 0 && 1890 (mydom[i] == '.' || mydom[i] == '\0')) 1891 { 1892 *--p = '\0'; 1893 return p; 1894 } 1895 return NULL; 1896 } 1897 /* 1898 ** PROG_OPEN -- open a program for reading 1899 ** 1900 ** Parameters: 1901 ** argv -- the argument list. 1902 ** pfd -- pointer to a place to store the file descriptor. 1903 ** e -- the current envelope. 1904 ** 1905 ** Returns: 1906 ** pid of the process -- -1 if it failed. 1907 */ 1908 1909 pid_t 1910 prog_open(argv, pfd, e) 1911 char **argv; 1912 int *pfd; 1913 ENVELOPE *e; 1914 { 1915 pid_t pid; 1916 int i; 1917 int save_errno; 1918 int sff; 1919 int ret; 1920 int fdv[2]; 1921 char *p, *q; 1922 char buf[MAXPATHLEN]; 1923 extern int DtableSize; 1924 1925 if (pipe(fdv) < 0) 1926 { 1927 syserr("%s: cannot create pipe for stdout", argv[0]); 1928 return -1; 1929 } 1930 pid = fork(); 1931 if (pid < 0) 1932 { 1933 syserr("%s: cannot fork", argv[0]); 1934 (void) close(fdv[0]); 1935 (void) close(fdv[1]); 1936 return -1; 1937 } 1938 if (pid > 0) 1939 { 1940 /* parent */ 1941 (void) close(fdv[1]); 1942 *pfd = fdv[0]; 1943 return pid; 1944 } 1945 1946 /* Reset global flags */ 1947 RestartRequest = NULL; 1948 RestartWorkGroup = false; 1949 ShutdownRequest = NULL; 1950 PendingSignal = 0; 1951 CurrentPid = getpid(); 1952 1953 /* 1954 ** Initialize exception stack and default exception 1955 ** handler for child process. 1956 */ 1957 1958 sm_exc_newthread(fatal_error); 1959 1960 /* child -- close stdin */ 1961 (void) close(0); 1962 1963 /* stdout goes back to parent */ 1964 (void) close(fdv[0]); 1965 if (dup2(fdv[1], 1) < 0) 1966 { 1967 syserr("%s: cannot dup2 for stdout", argv[0]); 1968 _exit(EX_OSERR); 1969 } 1970 (void) close(fdv[1]); 1971 1972 /* stderr goes to transcript if available */ 1973 if (e->e_xfp != NULL) 1974 { 1975 int xfd; 1976 1977 xfd = sm_io_getinfo(e->e_xfp, SM_IO_WHAT_FD, NULL); 1978 if (xfd >= 0 && dup2(xfd, 2) < 0) 1979 { 1980 syserr("%s: cannot dup2 for stderr", argv[0]); 1981 _exit(EX_OSERR); 1982 } 1983 } 1984 1985 /* this process has no right to the queue file */ 1986 if (e->e_lockfp != NULL) 1987 (void) close(sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD, NULL)); 1988 1989 /* chroot to the program mailer directory, if defined */ 1990 if (ProgMailer != NULL && ProgMailer->m_rootdir != NULL) 1991 { 1992 expand(ProgMailer->m_rootdir, buf, sizeof buf, e); 1993 if (chroot(buf) < 0) 1994 { 1995 syserr("prog_open: cannot chroot(%s)", buf); 1996 exit(EX_TEMPFAIL); 1997 } 1998 if (chdir("/") < 0) 1999 { 2000 syserr("prog_open: cannot chdir(/)"); 2001 exit(EX_TEMPFAIL); 2002 } 2003 } 2004 2005 /* run as default user */ 2006 endpwent(); 2007 sm_mbdb_terminate(); 2008 if (setgid(DefGid) < 0 && geteuid() == 0) 2009 { 2010 syserr("prog_open: setgid(%ld) failed", (long) DefGid); 2011 exit(EX_TEMPFAIL); 2012 } 2013 if (setuid(DefUid) < 0 && geteuid() == 0) 2014 { 2015 syserr("prog_open: setuid(%ld) failed", (long) DefUid); 2016 exit(EX_TEMPFAIL); 2017 } 2018 2019 /* run in some directory */ 2020 if (ProgMailer != NULL) 2021 p = ProgMailer->m_execdir; 2022 else 2023 p = NULL; 2024 for (; p != NULL; p = q) 2025 { 2026 q = strchr(p, ':'); 2027 if (q != NULL) 2028 *q = '\0'; 2029 expand(p, buf, sizeof buf, e); 2030 if (q != NULL) 2031 *q++ = ':'; 2032 if (buf[0] != '\0' && chdir(buf) >= 0) 2033 break; 2034 } 2035 if (p == NULL) 2036 { 2037 /* backup directories */ 2038 if (chdir("/tmp") < 0) 2039 (void) chdir("/"); 2040 } 2041 2042 /* Check safety of program to be run */ 2043 sff = SFF_ROOTOK|SFF_EXECOK; 2044 if (!bitnset(DBS_RUNWRITABLEPROGRAM, DontBlameSendmail)) 2045 sff |= SFF_NOGWFILES|SFF_NOWWFILES; 2046 if (bitnset(DBS_RUNPROGRAMINUNSAFEDIRPATH, DontBlameSendmail)) 2047 sff |= SFF_NOPATHCHECK; 2048 else 2049 sff |= SFF_SAFEDIRPATH; 2050 ret = safefile(argv[0], DefUid, DefGid, DefUser, sff, 0, NULL); 2051 if (ret != 0) 2052 sm_syslog(LOG_INFO, e->e_id, 2053 "Warning: prog_open: program %s unsafe: %s", 2054 argv[0], sm_errstring(ret)); 2055 2056 /* arrange for all the files to be closed */ 2057 for (i = 3; i < DtableSize; i++) 2058 { 2059 register int j; 2060 2061 if ((j = fcntl(i, F_GETFD, 0)) != -1) 2062 (void) fcntl(i, F_SETFD, j | FD_CLOEXEC); 2063 } 2064 2065 /* now exec the process */ 2066 (void) execve(argv[0], (ARGV_T) argv, (ARGV_T) UserEnviron); 2067 2068 /* woops! failed */ 2069 save_errno = errno; 2070 syserr("%s: cannot exec", argv[0]); 2071 if (transienterror(save_errno)) 2072 _exit(EX_OSERR); 2073 _exit(EX_CONFIG); 2074 return -1; /* avoid compiler warning on IRIX */ 2075 } 2076 /* 2077 ** GET_COLUMN -- look up a Column in a line buffer 2078 ** 2079 ** Parameters: 2080 ** line -- the raw text line to search. 2081 ** col -- the column number to fetch. 2082 ** delim -- the delimiter between columns. If null, 2083 ** use white space. 2084 ** buf -- the output buffer. 2085 ** buflen -- the length of buf. 2086 ** 2087 ** Returns: 2088 ** buf if successful. 2089 ** NULL otherwise. 2090 */ 2091 2092 char * 2093 get_column(line, col, delim, buf, buflen) 2094 char line[]; 2095 int col; 2096 int delim; 2097 char buf[]; 2098 int buflen; 2099 { 2100 char *p; 2101 char *begin, *end; 2102 int i; 2103 char delimbuf[4]; 2104 2105 if ((char) delim == '\0') 2106 (void) sm_strlcpy(delimbuf, "\n\t ", sizeof delimbuf); 2107 else 2108 { 2109 delimbuf[0] = (char) delim; 2110 delimbuf[1] = '\0'; 2111 } 2112 2113 p = line; 2114 if (*p == '\0') 2115 return NULL; /* line empty */ 2116 if (*p == (char) delim && col == 0) 2117 return NULL; /* first column empty */ 2118 2119 begin = line; 2120 2121 if (col == 0 && (char) delim == '\0') 2122 { 2123 while (*begin != '\0' && isascii(*begin) && isspace(*begin)) 2124 begin++; 2125 } 2126 2127 for (i = 0; i < col; i++) 2128 { 2129 if ((begin = strpbrk(begin, delimbuf)) == NULL) 2130 return NULL; /* no such column */ 2131 begin++; 2132 if ((char) delim == '\0') 2133 { 2134 while (*begin != '\0' && isascii(*begin) && isspace(*begin)) 2135 begin++; 2136 } 2137 } 2138 2139 end = strpbrk(begin, delimbuf); 2140 if (end == NULL) 2141 i = strlen(begin); 2142 else 2143 i = end - begin; 2144 if (i >= buflen) 2145 i = buflen - 1; 2146 (void) sm_strlcpy(buf, begin, i + 1); 2147 return buf; 2148 } 2149 /* 2150 ** CLEANSTRCPY -- copy string keeping out bogus characters 2151 ** 2152 ** Parameters: 2153 ** t -- "to" string. 2154 ** f -- "from" string. 2155 ** l -- length of space available in "to" string. 2156 ** 2157 ** Returns: 2158 ** none. 2159 */ 2160 2161 void 2162 cleanstrcpy(t, f, l) 2163 register char *t; 2164 register char *f; 2165 int l; 2166 { 2167 /* check for newlines and log if necessary */ 2168 (void) denlstring(f, true, true); 2169 2170 if (l <= 0) 2171 syserr("!cleanstrcpy: length == 0"); 2172 2173 l--; 2174 while (l > 0 && *f != '\0') 2175 { 2176 if (isascii(*f) && 2177 (isalnum(*f) || strchr("!#$%&'*+-./^_`{|}~", *f) != NULL)) 2178 { 2179 l--; 2180 *t++ = *f; 2181 } 2182 f++; 2183 } 2184 *t = '\0'; 2185 } 2186 /* 2187 ** DENLSTRING -- convert newlines in a string to spaces 2188 ** 2189 ** Parameters: 2190 ** s -- the input string 2191 ** strict -- if set, don't permit continuation lines. 2192 ** logattacks -- if set, log attempted attacks. 2193 ** 2194 ** Returns: 2195 ** A pointer to a version of the string with newlines 2196 ** mapped to spaces. This should be copied. 2197 */ 2198 2199 char * 2200 denlstring(s, strict, logattacks) 2201 char *s; 2202 bool strict; 2203 bool logattacks; 2204 { 2205 register char *p; 2206 int l; 2207 static char *bp = NULL; 2208 static int bl = 0; 2209 2210 p = s; 2211 while ((p = strchr(p, '\n')) != NULL) 2212 if (strict || (*++p != ' ' && *p != '\t')) 2213 break; 2214 if (p == NULL) 2215 return s; 2216 2217 l = strlen(s) + 1; 2218 if (bl < l) 2219 { 2220 /* allocate more space */ 2221 char *nbp = sm_pmalloc_x(l); 2222 2223 if (bp != NULL) 2224 sm_free(bp); 2225 bp = nbp; 2226 bl = l; 2227 } 2228 (void) sm_strlcpy(bp, s, l); 2229 for (p = bp; (p = strchr(p, '\n')) != NULL; ) 2230 *p++ = ' '; 2231 2232 if (logattacks) 2233 { 2234 sm_syslog(LOG_NOTICE, CurEnv->e_id, 2235 "POSSIBLE ATTACK from %.100s: newline in string \"%s\"", 2236 RealHostName == NULL ? "[UNKNOWN]" : RealHostName, 2237 shortenstring(bp, MAXSHORTSTR)); 2238 } 2239 2240 return bp; 2241 } 2242 2243 /* 2244 ** STRREPLNONPRT -- replace "unprintable" characters in a string with subst 2245 ** 2246 ** Parameters: 2247 ** s -- string to manipulate (in place) 2248 ** subst -- character to use as replacement 2249 ** 2250 ** Returns: 2251 ** true iff string did not contain "unprintable" characters 2252 */ 2253 2254 bool 2255 strreplnonprt(s, c) 2256 char *s; 2257 int c; 2258 { 2259 bool ok; 2260 2261 ok = true; 2262 if (s == NULL) 2263 return ok; 2264 while (*s != '\0') 2265 { 2266 if (!(isascii(*s) && isprint(*s))) 2267 { 2268 *s = c; 2269 ok = false; 2270 } 2271 ++s; 2272 } 2273 return ok; 2274 } 2275 2276 /* 2277 ** STR2PRT -- convert "unprintable" characters in a string to \oct 2278 ** 2279 ** Parameters: 2280 ** s -- string to convert 2281 ** 2282 ** Returns: 2283 ** converted string. 2284 ** This is a static local buffer, string must be copied 2285 ** before this function is called again! 2286 */ 2287 2288 char * 2289 str2prt(s) 2290 char *s; 2291 { 2292 int l; 2293 char c, *h; 2294 bool ok; 2295 static int len = 0; 2296 static char *buf = NULL; 2297 2298 if (s == NULL) 2299 return NULL; 2300 ok = true; 2301 for (h = s, l = 1; *h != '\0'; h++, l++) 2302 { 2303 if (*h == '\\') 2304 { 2305 ++l; 2306 ok = false; 2307 } 2308 else if (!(isascii(*h) && isprint(*h))) 2309 { 2310 l += 3; 2311 ok = false; 2312 } 2313 } 2314 if (ok) 2315 return s; 2316 if (l > len) 2317 { 2318 char *nbuf = sm_pmalloc_x(l); 2319 2320 if (buf != NULL) 2321 sm_free(buf); 2322 len = l; 2323 buf = nbuf; 2324 } 2325 for (h = buf; *s != '\0' && l > 0; s++, l--) 2326 { 2327 c = *s; 2328 if (isascii(c) && isprint(c) && c != '\\') 2329 { 2330 *h++ = c; 2331 } 2332 else 2333 { 2334 *h++ = '\\'; 2335 --l; 2336 switch (c) 2337 { 2338 case '\\': 2339 *h++ = '\\'; 2340 break; 2341 case '\t': 2342 *h++ = 't'; 2343 break; 2344 case '\n': 2345 *h++ = 'n'; 2346 break; 2347 case '\r': 2348 *h++ = 'r'; 2349 break; 2350 default: 2351 (void) sm_snprintf(h, l, "%03o", (int) c); 2352 2353 /* 2354 ** XXX since l is unsigned this may 2355 ** wrap around if the calculation is screwed 2356 ** up... 2357 */ 2358 2359 l -= 2; 2360 h += 3; 2361 break; 2362 } 2363 } 2364 } 2365 *h = '\0'; 2366 buf[len - 1] = '\0'; 2367 return buf; 2368 } 2369 /* 2370 ** PATH_IS_DIR -- check to see if file exists and is a directory. 2371 ** 2372 ** There are some additional checks for security violations in 2373 ** here. This routine is intended to be used for the host status 2374 ** support. 2375 ** 2376 ** Parameters: 2377 ** pathname -- pathname to check for directory-ness. 2378 ** createflag -- if set, create directory if needed. 2379 ** 2380 ** Returns: 2381 ** true -- if the indicated pathname is a directory 2382 ** false -- otherwise 2383 */ 2384 2385 int 2386 path_is_dir(pathname, createflag) 2387 char *pathname; 2388 bool createflag; 2389 { 2390 struct stat statbuf; 2391 2392 #if HASLSTAT 2393 if (lstat(pathname, &statbuf) < 0) 2394 #else /* HASLSTAT */ 2395 if (stat(pathname, &statbuf) < 0) 2396 #endif /* HASLSTAT */ 2397 { 2398 if (errno != ENOENT || !createflag) 2399 return false; 2400 if (mkdir(pathname, 0755) < 0) 2401 return false; 2402 return true; 2403 } 2404 if (!S_ISDIR(statbuf.st_mode)) 2405 { 2406 errno = ENOTDIR; 2407 return false; 2408 } 2409 2410 /* security: don't allow writable directories */ 2411 if (bitset(S_IWGRP|S_IWOTH, statbuf.st_mode)) 2412 { 2413 errno = EACCES; 2414 return false; 2415 } 2416 return true; 2417 } 2418 /* 2419 ** PROC_LIST_ADD -- add process id to list of our children 2420 ** 2421 ** Parameters: 2422 ** pid -- pid to add to list. 2423 ** task -- task of pid. 2424 ** type -- type of process. 2425 ** count -- number of processes. 2426 ** other -- other information for this type. 2427 ** 2428 ** Returns: 2429 ** none 2430 ** 2431 ** Side Effects: 2432 ** May increase CurChildren. May grow ProcList. 2433 */ 2434 2435 typedef struct procs PROCS_T; 2436 2437 struct procs 2438 { 2439 pid_t proc_pid; 2440 char *proc_task; 2441 int proc_type; 2442 int proc_count; 2443 int proc_other; 2444 }; 2445 2446 static PROCS_T *volatile ProcListVec = NULL; 2447 static int ProcListSize = 0; 2448 2449 void 2450 proc_list_add(pid, task, type, count, other) 2451 pid_t pid; 2452 char *task; 2453 int type; 2454 int count; 2455 int other; 2456 { 2457 int i; 2458 2459 for (i = 0; i < ProcListSize; i++) 2460 { 2461 if (ProcListVec[i].proc_pid == NO_PID) 2462 break; 2463 } 2464 if (i >= ProcListSize) 2465 { 2466 /* probe the existing vector to avoid growing infinitely */ 2467 proc_list_probe(); 2468 2469 /* now scan again */ 2470 for (i = 0; i < ProcListSize; i++) 2471 { 2472 if (ProcListVec[i].proc_pid == NO_PID) 2473 break; 2474 } 2475 } 2476 if (i >= ProcListSize) 2477 { 2478 /* grow process list */ 2479 PROCS_T *npv; 2480 2481 SM_ASSERT(ProcListSize < INT_MAX - PROC_LIST_SEG); 2482 npv = (PROCS_T *) sm_pmalloc_x((sizeof *npv) * 2483 (ProcListSize + PROC_LIST_SEG)); 2484 if (ProcListSize > 0) 2485 { 2486 memmove(npv, ProcListVec, 2487 ProcListSize * sizeof (PROCS_T)); 2488 sm_free(ProcListVec); 2489 } 2490 2491 /* XXX just use memset() to initialize this part? */ 2492 for (i = ProcListSize; i < ProcListSize + PROC_LIST_SEG; i++) 2493 { 2494 npv[i].proc_pid = NO_PID; 2495 npv[i].proc_task = NULL; 2496 npv[i].proc_type = PROC_NONE; 2497 } 2498 i = ProcListSize; 2499 ProcListSize += PROC_LIST_SEG; 2500 ProcListVec = npv; 2501 } 2502 ProcListVec[i].proc_pid = pid; 2503 PSTRSET(ProcListVec[i].proc_task, task); 2504 ProcListVec[i].proc_type = type; 2505 ProcListVec[i].proc_count = count; 2506 ProcListVec[i].proc_other = other; 2507 2508 /* if process adding itself, it's not a child */ 2509 if (pid != CurrentPid) 2510 { 2511 SM_ASSERT(CurChildren < INT_MAX); 2512 CurChildren++; 2513 } 2514 } 2515 /* 2516 ** PROC_LIST_SET -- set pid task in process list 2517 ** 2518 ** Parameters: 2519 ** pid -- pid to set 2520 ** task -- task of pid 2521 ** 2522 ** Returns: 2523 ** none. 2524 */ 2525 2526 void 2527 proc_list_set(pid, task) 2528 pid_t pid; 2529 char *task; 2530 { 2531 int i; 2532 2533 for (i = 0; i < ProcListSize; i++) 2534 { 2535 if (ProcListVec[i].proc_pid == pid) 2536 { 2537 PSTRSET(ProcListVec[i].proc_task, task); 2538 break; 2539 } 2540 } 2541 } 2542 /* 2543 ** PROC_LIST_DROP -- drop pid from process list 2544 ** 2545 ** Parameters: 2546 ** pid -- pid to drop 2547 ** st -- process status 2548 ** other -- storage for proc_other (return). 2549 ** 2550 ** Returns: 2551 ** none. 2552 ** 2553 ** Side Effects: 2554 ** May decrease CurChildren, CurRunners, or 2555 ** set RestartRequest or ShutdownRequest. 2556 ** 2557 ** NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER. DO NOT ADD 2558 ** ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE 2559 ** DOING. 2560 */ 2561 2562 void 2563 proc_list_drop(pid, st, other) 2564 pid_t pid; 2565 int st; 2566 int *other; 2567 { 2568 int i; 2569 int type = PROC_NONE; 2570 2571 for (i = 0; i < ProcListSize; i++) 2572 { 2573 if (ProcListVec[i].proc_pid == pid) 2574 { 2575 ProcListVec[i].proc_pid = NO_PID; 2576 type = ProcListVec[i].proc_type; 2577 if (other != NULL) 2578 *other = ProcListVec[i].proc_other; 2579 break; 2580 } 2581 } 2582 if (CurChildren > 0) 2583 CurChildren--; 2584 2585 2586 if (type == PROC_CONTROL && WIFEXITED(st)) 2587 { 2588 /* if so, see if we need to restart or shutdown */ 2589 if (WEXITSTATUS(st) == EX_RESTART) 2590 RestartRequest = "control socket"; 2591 else if (WEXITSTATUS(st) == EX_SHUTDOWN) 2592 ShutdownRequest = "control socket"; 2593 } 2594 else if (type == PROC_QUEUE_CHILD && !WIFSTOPPED(st) && 2595 ProcListVec[i].proc_other > -1) 2596 { 2597 /* restart this persistent runner */ 2598 mark_work_group_restart(ProcListVec[i].proc_other, st); 2599 } 2600 else if (type == PROC_QUEUE) 2601 CurRunners -= ProcListVec[i].proc_count; 2602 } 2603 /* 2604 ** PROC_LIST_CLEAR -- clear the process list 2605 ** 2606 ** Parameters: 2607 ** none. 2608 ** 2609 ** Returns: 2610 ** none. 2611 ** 2612 ** Side Effects: 2613 ** Sets CurChildren to zero. 2614 */ 2615 2616 void 2617 proc_list_clear() 2618 { 2619 int i; 2620 2621 /* start from 1 since 0 is the daemon itself */ 2622 for (i = 1; i < ProcListSize; i++) 2623 ProcListVec[i].proc_pid = NO_PID; 2624 CurChildren = 0; 2625 } 2626 /* 2627 ** PROC_LIST_PROBE -- probe processes in the list to see if they still exist 2628 ** 2629 ** Parameters: 2630 ** none 2631 ** 2632 ** Returns: 2633 ** none 2634 ** 2635 ** Side Effects: 2636 ** May decrease CurChildren. 2637 */ 2638 2639 void 2640 proc_list_probe() 2641 { 2642 int i; 2643 2644 /* start from 1 since 0 is the daemon itself */ 2645 for (i = 1; i < ProcListSize; i++) 2646 { 2647 if (ProcListVec[i].proc_pid == NO_PID) 2648 continue; 2649 if (kill(ProcListVec[i].proc_pid, 0) < 0) 2650 { 2651 if (LogLevel > 3) 2652 sm_syslog(LOG_DEBUG, CurEnv->e_id, 2653 "proc_list_probe: lost pid %d", 2654 (int) ProcListVec[i].proc_pid); 2655 ProcListVec[i].proc_pid = NO_PID; 2656 SM_FREE_CLR(ProcListVec[i].proc_task); 2657 CurChildren--; 2658 } 2659 } 2660 if (CurChildren < 0) 2661 CurChildren = 0; 2662 } 2663 2664 /* 2665 ** PROC_LIST_DISPLAY -- display the process list 2666 ** 2667 ** Parameters: 2668 ** out -- output file pointer 2669 ** prefix -- string to output in front of each line. 2670 ** 2671 ** Returns: 2672 ** none. 2673 */ 2674 2675 void 2676 proc_list_display(out, prefix) 2677 SM_FILE_T *out; 2678 char *prefix; 2679 { 2680 int i; 2681 2682 for (i = 0; i < ProcListSize; i++) 2683 { 2684 if (ProcListVec[i].proc_pid == NO_PID) 2685 continue; 2686 2687 (void) sm_io_fprintf(out, SM_TIME_DEFAULT, "%s%d %s%s\n", 2688 prefix, 2689 (int) ProcListVec[i].proc_pid, 2690 ProcListVec[i].proc_task != NULL ? 2691 ProcListVec[i].proc_task : "(unknown)", 2692 (OpMode == MD_SMTP || 2693 OpMode == MD_DAEMON || 2694 OpMode == MD_ARPAFTP) ? "\r" : ""); 2695 } 2696 } 2697 2698 /* 2699 ** PROC_LIST_SIGNAL -- send a signal to a type of process in the list 2700 ** 2701 ** Parameters: 2702 ** type -- type of process to signal 2703 ** signal -- the type of signal to send 2704 ** 2705 ** Results: 2706 ** none. 2707 ** 2708 ** NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER. DO NOT ADD 2709 ** ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE 2710 ** DOING. 2711 */ 2712 2713 void 2714 proc_list_signal(type, signal) 2715 int type; 2716 int signal; 2717 { 2718 int chldwasblocked; 2719 int alrmwasblocked; 2720 int i; 2721 pid_t mypid = getpid(); 2722 2723 /* block these signals so that we may signal cleanly */ 2724 chldwasblocked = sm_blocksignal(SIGCHLD); 2725 alrmwasblocked = sm_blocksignal(SIGALRM); 2726 2727 /* Find all processes of type and send signal */ 2728 for (i = 0; i < ProcListSize; i++) 2729 { 2730 if (ProcListVec[i].proc_pid == NO_PID || 2731 ProcListVec[i].proc_pid == mypid) 2732 continue; 2733 if (ProcListVec[i].proc_type != type) 2734 continue; 2735 (void) kill(ProcListVec[i].proc_pid, signal); 2736 } 2737 2738 /* restore the signals */ 2739 if (alrmwasblocked == 0) 2740 (void) sm_releasesignal(SIGALRM); 2741 if (chldwasblocked == 0) 2742 (void) sm_releasesignal(SIGCHLD); 2743 } 2744