1 /* 2 * Copyright (c) 1983, 1995 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[] = "@(#)conf.c 8.174 (Berkeley) 05/24/95"; 11 #endif /* not lint */ 12 13 # include "sendmail.h" 14 # include "pathnames.h" 15 # include <sys/ioctl.h> 16 # include <sys/param.h> 17 18 /* 19 ** CONF.C -- Sendmail Configuration Tables. 20 ** 21 ** Defines the configuration of this installation. 22 ** 23 ** Configuration Variables: 24 ** HdrInfo -- a table describing well-known header fields. 25 ** Each entry has the field name and some flags, 26 ** which are described in sendmail.h. 27 ** 28 ** Notes: 29 ** I have tried to put almost all the reasonable 30 ** configuration information into the configuration 31 ** file read at runtime. My intent is that anything 32 ** here is a function of the version of UNIX you 33 ** are running, or is really static -- for example 34 ** the headers are a superset of widely used 35 ** protocols. If you find yourself playing with 36 ** this file too much, you may be making a mistake! 37 */ 38 39 40 41 42 /* 43 ** Header info table 44 ** Final (null) entry contains the flags used for any other field. 45 ** 46 ** Not all of these are actually handled specially by sendmail 47 ** at this time. They are included as placeholders, to let 48 ** you know that "someday" I intend to have sendmail do 49 ** something with them. 50 */ 51 52 struct hdrinfo HdrInfo[] = 53 { 54 /* originator fields, most to least significant */ 55 "resent-sender", H_FROM|H_RESENT, 56 "resent-from", H_FROM|H_RESENT, 57 "resent-reply-to", H_FROM|H_RESENT, 58 "sender", H_FROM, 59 "from", H_FROM, 60 "reply-to", H_FROM, 61 "full-name", H_ACHECK, 62 "return-receipt-to", H_FROM|H_RECEIPTTO, 63 "errors-to", H_FROM|H_ERRORSTO, 64 65 /* destination fields */ 66 "to", H_RCPT, 67 "resent-to", H_RCPT|H_RESENT, 68 "cc", H_RCPT, 69 "resent-cc", H_RCPT|H_RESENT, 70 "bcc", H_RCPT|H_STRIPVAL, 71 "resent-bcc", H_RCPT|H_STRIPVAL|H_RESENT, 72 "apparently-to", H_RCPT, 73 74 /* message identification and control */ 75 "message-id", 0, 76 "resent-message-id", H_RESENT, 77 "message", H_EOH, 78 "text", H_EOH, 79 80 /* date fields */ 81 "date", 0, 82 "resent-date", H_RESENT, 83 84 /* trace fields */ 85 "received", H_TRACE|H_FORCE, 86 "x400-received", H_TRACE|H_FORCE, 87 "via", H_TRACE|H_FORCE, 88 "mail-from", H_TRACE|H_FORCE, 89 90 /* miscellaneous fields */ 91 "comments", H_FORCE, 92 "return-path", H_FORCE|H_ACHECK, 93 "content-transfer-encoding", H_CTE, 94 "content-type", H_CTYPE, 95 "content-length", H_ACHECK, 96 97 NULL, 0, 98 }; 99 100 101 102 /* 103 ** Location of system files/databases/etc. 104 */ 105 106 char *PidFile = _PATH_SENDMAILPID; /* stores daemon proc id */ 107 108 109 110 /* 111 ** Privacy values 112 */ 113 114 struct prival PrivacyValues[] = 115 { 116 "public", PRIV_PUBLIC, 117 "needmailhelo", PRIV_NEEDMAILHELO, 118 "needexpnhelo", PRIV_NEEDEXPNHELO, 119 "needvrfyhelo", PRIV_NEEDVRFYHELO, 120 "noexpn", PRIV_NOEXPN, 121 "novrfy", PRIV_NOVRFY, 122 "restrictmailq", PRIV_RESTRICTMAILQ, 123 "restrictqrun", PRIV_RESTRICTQRUN, 124 "authwarnings", PRIV_AUTHWARNINGS, 125 "noreceipts", PRIV_NORECEIPTS, 126 "goaway", PRIV_GOAWAY, 127 NULL, 0, 128 }; 129 130 131 132 /* 133 ** Miscellaneous stuff. 134 */ 135 136 int DtableSize = 50; /* max open files; reset in 4.2bsd */ 137 /* 138 ** SETDEFAULTS -- set default values 139 ** 140 ** Because of the way freezing is done, these must be initialized 141 ** using direct code. 142 ** 143 ** Parameters: 144 ** e -- the default envelope. 145 ** 146 ** Returns: 147 ** none. 148 ** 149 ** Side Effects: 150 ** Initializes a bunch of global variables to their 151 ** default values. 152 */ 153 154 #define DAYS * 24 * 60 * 60 155 156 void 157 setdefaults(e) 158 register ENVELOPE *e; 159 { 160 int i; 161 extern void inittimeouts(); 162 extern void setdefuser(); 163 extern void setupmaps(); 164 extern void setupmailers(); 165 166 SpaceSub = ' '; /* option B */ 167 QueueLA = 8; /* option x */ 168 RefuseLA = 12; /* option X */ 169 WkRecipFact = 30000L; /* option y */ 170 WkClassFact = 1800L; /* option z */ 171 WkTimeFact = 90000L; /* option Z */ 172 QueueFactor = WkRecipFact * 20; /* option q */ 173 FileMode = (RealUid != geteuid()) ? 0644 : 0600; 174 /* option F */ 175 DefUid = 1; /* option u */ 176 DefGid = 1; /* option g */ 177 CheckpointInterval = 10; /* option C */ 178 MaxHopCount = 25; /* option h */ 179 e->e_sendmode = SM_FORK; /* option d */ 180 e->e_errormode = EM_PRINT; /* option e */ 181 SevenBitInput = FALSE; /* option 7 */ 182 MaxMciCache = 1; /* option k */ 183 MciCacheTimeout = 300; /* option K */ 184 LogLevel = 9; /* option L */ 185 inittimeouts(NULL); /* option r */ 186 PrivacyFlags = 0; /* option p */ 187 #if MIME8TO7 188 MimeMode = MM_CVTMIME|MM_PASS8BIT; /* option 8 */ 189 #else 190 MimeMode = MM_PASS8BIT; 191 #endif 192 for (i = 0; i < MAXTOCLASS; i++) 193 { 194 TimeOuts.to_q_return[i] = 5 DAYS; /* option T */ 195 TimeOuts.to_q_warning[i] = 0; /* option T */ 196 } 197 ServiceSwitchFile = "/etc/service.switch"; 198 HostsFile = _PATH_HOSTS; 199 setdefuser(); 200 setupmaps(); 201 setupmailers(); 202 } 203 204 205 /* 206 ** SETDEFUSER -- set/reset DefUser using DefUid (for initgroups()) 207 */ 208 209 void 210 setdefuser() 211 { 212 struct passwd *defpwent; 213 static char defuserbuf[40]; 214 215 DefUser = defuserbuf; 216 if ((defpwent = sm_getpwuid(DefUid)) != NULL) 217 strcpy(defuserbuf, defpwent->pw_name); 218 else 219 strcpy(defuserbuf, "nobody"); 220 } 221 /* 222 ** HOST_MAP_INIT -- initialize host class structures 223 */ 224 225 bool host_map_init __P((MAP *map, char *args)); 226 227 bool 228 host_map_init(map, args) 229 MAP *map; 230 char *args; 231 { 232 register char *p = args; 233 234 for (;;) 235 { 236 while (isascii(*p) && isspace(*p)) 237 p++; 238 if (*p != '-') 239 break; 240 switch (*++p) 241 { 242 case 'a': 243 map->map_app = ++p; 244 break; 245 } 246 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 247 p++; 248 if (*p != '\0') 249 *p++ = '\0'; 250 } 251 if (map->map_app != NULL) 252 map->map_app = newstr(map->map_app); 253 return TRUE; 254 } 255 /* 256 ** SETUPMAILERS -- initialize default mailers 257 */ 258 259 void 260 setupmailers() 261 { 262 char buf[100]; 263 extern void makemailer(); 264 265 strcpy(buf, "prog, P=/bin/sh, F=lsoD, T=X-Unix, A=sh -c $u"); 266 makemailer(buf); 267 268 strcpy(buf, "*file*, P=[FILE], F=lsDFMPEou, T=X-Unix, A=FILE"); 269 makemailer(buf); 270 271 strcpy(buf, "*include*, P=/dev/null, F=su, A=INCLUDE"); 272 makemailer(buf); 273 } 274 /* 275 ** SETUPMAPS -- set up map classes 276 */ 277 278 #define MAPDEF(name, ext, flags, parse, open, close, lookup, store) \ 279 { \ 280 extern bool parse __P((MAP *, char *)); \ 281 extern bool open __P((MAP *, int)); \ 282 extern void close __P((MAP *)); \ 283 extern char *lookup __P((MAP *, char *, char **, int *)); \ 284 extern void store __P((MAP *, char *, char *)); \ 285 s = stab(name, ST_MAPCLASS, ST_ENTER); \ 286 s->s_mapclass.map_cname = name; \ 287 s->s_mapclass.map_ext = ext; \ 288 s->s_mapclass.map_cflags = flags; \ 289 s->s_mapclass.map_parse = parse; \ 290 s->s_mapclass.map_open = open; \ 291 s->s_mapclass.map_close = close; \ 292 s->s_mapclass.map_lookup = lookup; \ 293 s->s_mapclass.map_store = store; \ 294 } 295 296 void 297 setupmaps() 298 { 299 register STAB *s; 300 301 #ifdef NEWDB 302 MAPDEF("hash", ".db", MCF_ALIASOK|MCF_REBUILDABLE, 303 map_parseargs, hash_map_open, db_map_close, 304 db_map_lookup, db_map_store); 305 306 MAPDEF("btree", ".db", MCF_ALIASOK|MCF_REBUILDABLE, 307 map_parseargs, bt_map_open, db_map_close, 308 db_map_lookup, db_map_store); 309 #endif 310 311 #ifdef NDBM 312 MAPDEF("dbm", ".dir", MCF_ALIASOK|MCF_REBUILDABLE, 313 map_parseargs, ndbm_map_open, ndbm_map_close, 314 ndbm_map_lookup, ndbm_map_store); 315 #endif 316 317 #ifdef NIS 318 MAPDEF("nis", NULL, MCF_ALIASOK, 319 map_parseargs, nis_map_open, null_map_close, 320 nis_map_lookup, null_map_store); 321 #endif 322 323 #ifdef NISPLUS 324 MAPDEF("nisplus", NULL, MCF_ALIASOK, 325 map_parseargs, nisplus_map_open, null_map_close, 326 nisplus_map_lookup, null_map_store); 327 #endif 328 329 #ifdef HESIOD 330 MAPDEF("hesiod", NULL, MCF_ALIASOK|MCF_ALIASONLY, 331 map_parseargs, null_map_open, null_map_close, 332 hes_map_lookup, null_map_store); 333 #endif 334 335 #ifdef NETINFO 336 MAPDEF("netinfo", NULL, MCF_ALIASOK, 337 map_parseargs, ni_map_open, null_map_close, 338 ni_map_lookup, null_map_store); 339 #endif 340 341 #if 0 342 MAPDEF("dns", NULL, 0, 343 dns_map_init, null_map_open, null_map_close, 344 dns_map_lookup, null_map_store); 345 #endif 346 347 #if NAMED_BIND 348 /* best MX DNS lookup */ 349 MAPDEF("bestmx", NULL, MCF_OPTFILE, 350 map_parseargs, null_map_open, null_map_close, 351 bestmx_map_lookup, null_map_store); 352 #endif 353 354 MAPDEF("host", NULL, 0, 355 host_map_init, null_map_open, null_map_close, 356 host_map_lookup, null_map_store); 357 358 MAPDEF("text", NULL, MCF_ALIASOK, 359 map_parseargs, text_map_open, null_map_close, 360 text_map_lookup, null_map_store); 361 362 MAPDEF("stab", NULL, MCF_ALIASOK|MCF_ALIASONLY, 363 map_parseargs, stab_map_open, null_map_close, 364 stab_map_lookup, stab_map_store); 365 366 MAPDEF("implicit", NULL, MCF_ALIASOK|MCF_ALIASONLY|MCF_REBUILDABLE, 367 map_parseargs, impl_map_open, impl_map_close, 368 impl_map_lookup, impl_map_store); 369 370 /* access to system passwd file */ 371 MAPDEF("user", NULL, MCF_OPTFILE, 372 map_parseargs, user_map_open, null_map_close, 373 user_map_lookup, null_map_store); 374 375 /* dequote map */ 376 MAPDEF("dequote", NULL, 0, 377 dequote_init, null_map_open, null_map_close, 378 dequote_map, null_map_store); 379 380 #ifdef USERDB 381 /* user database */ 382 MAPDEF("userdb", ".db", 0, 383 map_parseargs, null_map_open, null_map_close, 384 udb_map_lookup, null_map_store); 385 #endif 386 387 /* arbitrary programs */ 388 MAPDEF("program", NULL, MCF_ALIASOK, 389 map_parseargs, null_map_open, null_map_close, 390 prog_map_lookup, null_map_store); 391 392 /* sequenced maps */ 393 MAPDEF("sequence", NULL, MCF_ALIASOK, 394 seq_map_parse, null_map_open, null_map_close, 395 seq_map_lookup, seq_map_store); 396 397 /* switched interface to sequenced maps */ 398 MAPDEF("switch", NULL, MCF_ALIASOK, 399 map_parseargs, switch_map_open, null_map_close, 400 seq_map_lookup, seq_map_store); 401 } 402 403 #undef MAPDEF 404 /* 405 ** INITHOSTMAPS -- initial host-dependent maps 406 ** 407 ** This should act as an interface to any local service switch 408 ** provided by the host operating system. 409 ** 410 ** Parameters: 411 ** none 412 ** 413 ** Returns: 414 ** none 415 ** 416 ** Side Effects: 417 ** Should define maps "host" and "users" as necessary 418 ** for this OS. If they are not defined, they will get 419 ** a default value later. It should check to make sure 420 ** they are not defined first, since it's possible that 421 ** the config file has provided an override. 422 */ 423 424 void 425 inithostmaps() 426 { 427 register int i; 428 int nmaps; 429 char *maptype[MAXMAPSTACK]; 430 short mapreturn[MAXMAPACTIONS]; 431 char buf[MAXLINE]; 432 433 /* 434 ** Set up default hosts maps. 435 */ 436 437 #if 0 438 nmaps = switch_map_find("hosts", maptype, mapreturn); 439 for (i = 0; i < nmaps; i++) 440 { 441 if (strcmp(maptype[i], "files") == 0 && 442 stab("hosts.files", ST_MAP, ST_FIND) == NULL) 443 { 444 strcpy(buf, "hosts.files text -k 0 -v 1 /etc/hosts"); 445 makemapentry(buf); 446 } 447 #if NAMED_BIND 448 else if (strcmp(maptype[i], "dns") == 0 && 449 stab("hosts.dns", ST_MAP, ST_FIND) == NULL) 450 { 451 strcpy(buf, "hosts.dns dns A"); 452 makemapentry(buf); 453 } 454 #endif 455 #ifdef NISPLUS 456 else if (strcmp(maptype[i], "nisplus") == 0 && 457 stab("hosts.nisplus", ST_MAP, ST_FIND) == NULL) 458 { 459 strcpy(buf, "hosts.nisplus nisplus -k name -v address -d hosts.org_dir"); 460 makemapentry(buf); 461 } 462 #endif 463 #ifdef NIS 464 else if (strcmp(maptype[i], "nis") == 0 && 465 stab("hosts.nis", ST_MAP, ST_FIND) == NULL) 466 { 467 strcpy(buf, "hosts.nis nis -d -k 0 -v 1 hosts.byname"); 468 makemapentry(buf); 469 } 470 #endif 471 } 472 #endif 473 474 /* 475 ** Make sure we have a host map. 476 */ 477 478 if (stab("host", ST_MAP, ST_FIND) == NULL) 479 { 480 /* user didn't initialize: set up host map */ 481 strcpy(buf, "host host"); 482 #if NAMED_BIND 483 if (ConfigLevel >= 2) 484 strcat(buf, " -a."); 485 #endif 486 makemapentry(buf); 487 } 488 489 /* 490 ** Set up default aliases maps 491 */ 492 493 nmaps = switch_map_find("aliases", maptype, mapreturn); 494 for (i = 0; i < nmaps; i++) 495 { 496 if (strcmp(maptype[i], "files") == 0 && 497 stab("aliases.files", ST_MAP, ST_FIND) == NULL) 498 { 499 strcpy(buf, "aliases.files implicit /etc/aliases"); 500 makemapentry(buf); 501 } 502 #ifdef NISPLUS 503 else if (strcmp(maptype[i], "nisplus") == 0 && 504 stab("aliases.nisplus", ST_MAP, ST_FIND) == NULL) 505 { 506 strcpy(buf, "aliases.nisplus nisplus -kalias -vexpansion -d mail_aliases.org_dir"); 507 makemapentry(buf); 508 } 509 #endif 510 #ifdef NIS 511 else if (strcmp(maptype[i], "nis") == 0 && 512 stab("aliases.nis", ST_MAP, ST_FIND) == NULL) 513 { 514 strcpy(buf, "aliases.nis nis -d mail.aliases"); 515 makemapentry(buf); 516 } 517 #endif 518 } 519 if (stab("aliases", ST_MAP, ST_FIND) == NULL) 520 { 521 strcpy(buf, "aliases switch aliases"); 522 makemapentry(buf); 523 } 524 strcpy(buf, "switch:aliases"); 525 setalias(buf); 526 527 #if 0 /* "user" map class is a better choice */ 528 /* 529 ** Set up default users maps. 530 */ 531 532 nmaps = switch_map_find("passwd", maptype, mapreturn); 533 for (i = 0; i < nmaps; i++) 534 { 535 if (strcmp(maptype[i], "files") == 0 && 536 stab("users.files", ST_MAP, ST_FIND) == NULL) 537 { 538 strcpy(buf, "users.files text -m -z: -k0 -v6 /etc/passwd"); 539 makemapentry(buf); 540 } 541 #ifdef NISPLUS 542 else if (strcmp(maptype[i], "nisplus") == 0 && 543 stab("users.nisplus", ST_MAP, ST_FIND) == NULL) 544 { 545 strcpy(buf, "users.nisplus nisplus -m -kname -vhome -d passwd.org_dir"); 546 makemapentry(buf); 547 } 548 #endif 549 #ifdef NIS 550 else if (strcmp(maptype[i], "nis") == 0 && 551 stab("users.nis", ST_MAP, ST_FIND) == NULL) 552 { 553 strcpy(buf, "users.nis nis -m -d passwd.byname"); 554 makemapentry(buf); 555 } 556 #endif 557 #ifdef HESIOD 558 else if (strcmp(maptype[i], "hesiod") == 0) && 559 stab("users.hesiod", ST_MAP, ST_FIND) == NULL) 560 { 561 strcpy(buf, "users.hesiod hesiod"); 562 makemapentry(buf); 563 } 564 #endif 565 } 566 if (stab("users", ST_MAP, ST_FIND) == NULL) 567 { 568 strcpy(buf, "users switch -m passwd"); 569 makemapentry(buf); 570 } 571 #endif 572 } 573 /* 574 ** SWITCH_MAP_FIND -- find the list of types associated with a map 575 ** 576 ** This is the system-dependent interface to the service switch. 577 ** 578 ** Parameters: 579 ** service -- the name of the service of interest. 580 ** maptype -- an out-array of strings containing the types 581 ** of access to use for this service. There can 582 ** be at most MAXMAPSTACK types for a single service. 583 ** mapreturn -- an out-array of return information bitmaps 584 ** for the map. 585 ** 586 ** Returns: 587 ** The number of map types filled in, or -1 for failure. 588 */ 589 590 #ifdef SOLARIS 591 # include <nsswitch.h> 592 #endif 593 594 #if defined(ultrix) || defined(__osf__) 595 # include <sys/svcinfo.h> 596 #endif 597 598 int 599 switch_map_find(service, maptype, mapreturn) 600 char *service; 601 char *maptype[MAXMAPSTACK]; 602 short mapreturn[MAXMAPACTIONS]; 603 { 604 register FILE *fp; 605 int svcno; 606 static char buf[MAXLINE]; 607 608 #ifdef SOLARIS 609 struct __nsw_switchconfig *nsw_conf; 610 enum __nsw_parse_err pserr; 611 struct __nsw_lookup *lk; 612 int nsw_rc; 613 static struct __nsw_lookup lkp0 = 614 { "files", {1, 0, 0, 0}, NULL, NULL }; 615 static struct __nsw_switchconfig lkp_default = 616 { 0, "sendmail", 3, &lkp0 }; 617 618 if ((nsw_conf = __nsw_getconfig(service, &pserr)) == NULL) 619 lk = lkp_default.lookups; 620 else 621 lk = nsw_conf->lookups; 622 svcno = 0; 623 while (lk != NULL) 624 { 625 maptype[svcno] = lk->service_name; 626 if (lk->actions[__NSW_NOTFOUND] == __NSW_RETURN) 627 mapreturn[MA_NOTFOUND] |= 1 << svcno; 628 if (lk->actions[__NSW_TRYAGAIN] == __NSW_RETURN) 629 mapreturn[MA_TRYAGAIN] |= 1 << svcno; 630 if (lk->actions[__NSW_UNAVAIL] == __NSW_RETURN) 631 mapreturn[MA_TRYAGAIN] |= 1 << svcno; 632 svcno++; 633 lk = lk->next; 634 } 635 return svcno; 636 #endif 637 638 #if defined(ultrix) || defined(__osf__) 639 struct svcinfo *svcinfo; 640 int svc; 641 642 for (svcno = 0; svcno < MAXMAPACTIONS; svcno++) 643 mapreturn[svcno] = 0; 644 645 svcinfo = getsvc(); 646 if (svcinfo == NULL) 647 goto punt; 648 if (strcmp(service, "hosts") == 0) 649 svc = SVC_HOSTS; 650 else if (strcmp(service, "aliases") == 0) 651 svc = SVC_ALIASES; 652 else if (strcmp(service, "passwd") == 0) 653 svc = SVC_PASSWD; 654 else 655 return -1; 656 for (svcno = 0; svcno < SVC_PATHSIZE; svcno++) 657 { 658 switch (svcinfo->svcpath[svc][svcno]) 659 { 660 case SVC_LOCAL: 661 maptype[svcno] = "files"; 662 break; 663 664 case SVC_YP: 665 maptype[svcno] = "nis"; 666 break; 667 668 case SVC_BIND: 669 maptype[svcno] = "dns"; 670 break; 671 672 #ifdef SVC_HESIOD 673 case SVC_HESIOD: 674 maptype[svcno] = "hesiod"; 675 break; 676 #endif 677 678 case SVC_LAST: 679 return svcno; 680 } 681 } 682 return svcno; 683 #endif 684 685 #if !defined(SOLARIS) && !defined(ultrix) && !defined(__osf__) 686 /* 687 ** Fall-back mechanism. 688 */ 689 690 for (svcno = 0; svcno < MAXMAPACTIONS; svcno++) 691 mapreturn[svcno] = 0; 692 693 svcno = 0; 694 fp = fopen(ServiceSwitchFile, "r"); 695 if (fp != NULL) 696 { 697 while (fgets(buf, sizeof buf, fp) != NULL) 698 { 699 register char *p; 700 701 p = strpbrk(buf, "#\n"); 702 if (p != NULL) 703 *p = '\0'; 704 p = strpbrk(buf, " \t"); 705 if (p != NULL) 706 *p++ = '\0'; 707 if (strcmp(buf, service) != 0) 708 continue; 709 710 /* got the right service -- extract data */ 711 do 712 { 713 while (isspace(*p)) 714 p++; 715 if (*p == '\0') 716 break; 717 maptype[svcno++] = p; 718 p = strpbrk(p, " \t"); 719 if (p != NULL) 720 *p++ = '\0'; 721 } while (p != NULL); 722 break; 723 } 724 fclose(fp); 725 return svcno; 726 } 727 #endif 728 729 /* if the service file doesn't work, use an absolute fallback */ 730 punt: 731 for (svcno = 0; svcno < MAXMAPACTIONS; svcno++) 732 mapreturn[svcno] = 0; 733 svcno = 0; 734 if (strcmp(service, "aliases") == 0) 735 { 736 maptype[svcno++] = "files"; 737 #ifdef AUTO_NIS_ALIASES 738 # ifdef NISPLUS 739 maptype[svcno++] = "nisplus"; 740 # endif 741 # ifdef NIS 742 maptype[svcno++] = "nis"; 743 # endif 744 #endif 745 return svcno; 746 } 747 if (strcmp(service, "hosts") == 0) 748 { 749 # if NAMED_BIND 750 maptype[svcno++] = "dns"; 751 # else 752 # if defined(sun) && !defined(BSD) && !defined(SOLARIS) 753 /* SunOS */ 754 maptype[svcno++] = "nis"; 755 # endif 756 # endif 757 maptype[svcno++] = "files"; 758 return svcno; 759 } 760 return -1; 761 } 762 /* 763 ** USERNAME -- return the user id of the logged in user. 764 ** 765 ** Parameters: 766 ** none. 767 ** 768 ** Returns: 769 ** The login name of the logged in user. 770 ** 771 ** Side Effects: 772 ** none. 773 ** 774 ** Notes: 775 ** The return value is statically allocated. 776 */ 777 778 char * 779 username() 780 { 781 static char *myname = NULL; 782 extern char *getlogin(); 783 register struct passwd *pw; 784 785 /* cache the result */ 786 if (myname == NULL) 787 { 788 myname = getlogin(); 789 if (myname == NULL || myname[0] == '\0') 790 { 791 pw = sm_getpwuid(RealUid); 792 if (pw != NULL) 793 myname = newstr(pw->pw_name); 794 } 795 else 796 { 797 uid_t uid = RealUid; 798 799 myname = newstr(myname); 800 if ((pw = sm_getpwnam(myname)) == NULL || 801 (uid != 0 && uid != pw->pw_uid)) 802 { 803 pw = sm_getpwuid(uid); 804 if (pw != NULL) 805 myname = newstr(pw->pw_name); 806 } 807 } 808 if (myname == NULL || myname[0] == '\0') 809 { 810 syserr("554 Who are you?"); 811 myname = "postmaster"; 812 } 813 } 814 815 return (myname); 816 } 817 /* 818 ** TTYPATH -- Get the path of the user's tty 819 ** 820 ** Returns the pathname of the user's tty. Returns NULL if 821 ** the user is not logged in or if s/he has write permission 822 ** denied. 823 ** 824 ** Parameters: 825 ** none 826 ** 827 ** Returns: 828 ** pathname of the user's tty. 829 ** NULL if not logged in or write permission denied. 830 ** 831 ** Side Effects: 832 ** none. 833 ** 834 ** WARNING: 835 ** Return value is in a local buffer. 836 ** 837 ** Called By: 838 ** savemail 839 */ 840 841 char * 842 ttypath() 843 { 844 struct stat stbuf; 845 register char *pathn; 846 extern char *ttyname(); 847 extern char *getlogin(); 848 849 /* compute the pathname of the controlling tty */ 850 if ((pathn = ttyname(2)) == NULL && (pathn = ttyname(1)) == NULL && 851 (pathn = ttyname(0)) == NULL) 852 { 853 errno = 0; 854 return (NULL); 855 } 856 857 /* see if we have write permission */ 858 if (stat(pathn, &stbuf) < 0 || !bitset(02, stbuf.st_mode)) 859 { 860 errno = 0; 861 return (NULL); 862 } 863 864 /* see if the user is logged in */ 865 if (getlogin() == NULL) 866 return (NULL); 867 868 /* looks good */ 869 return (pathn); 870 } 871 /* 872 ** CHECKCOMPAT -- check for From and To person compatible. 873 ** 874 ** This routine can be supplied on a per-installation basis 875 ** to determine whether a person is allowed to send a message. 876 ** This allows restriction of certain types of internet 877 ** forwarding or registration of users. 878 ** 879 ** If the hosts are found to be incompatible, an error 880 ** message should be given using "usrerr" and an EX_ code 881 ** should be returned. You can also set to->q_status to 882 ** a DSN-style status code. 883 ** 884 ** EF_NO_BODY_RETN can be set in e->e_flags to suppress the 885 ** body during the return-to-sender function; this should be done 886 ** on huge messages. This bit may already be set by the ESMTP 887 ** protocol. 888 ** 889 ** Parameters: 890 ** to -- the person being sent to. 891 ** 892 ** Returns: 893 ** an exit status 894 ** 895 ** Side Effects: 896 ** none (unless you include the usrerr stuff) 897 */ 898 899 int 900 checkcompat(to, e) 901 register ADDRESS *to; 902 register ENVELOPE *e; 903 { 904 # ifdef lint 905 if (to == NULL) 906 to++; 907 # endif /* lint */ 908 909 if (tTd(49, 1)) 910 printf("checkcompat(to=%s, from=%s)\n", 911 to->q_paddr, e->e_from.q_paddr); 912 913 # ifdef EXAMPLE_CODE 914 /* this code is intended as an example only */ 915 register STAB *s; 916 917 s = stab("arpa", ST_MAILER, ST_FIND); 918 if (s != NULL && strcmp(e->e_from.q_mailer->m_name, "local") != 0 && 919 to->q_mailer == s->s_mailer) 920 { 921 usrerr("553 No ARPA mail through this machine: see your system administration"); 922 /* e->e_flags |= EF_NO_BODY_RETN; to supress body on return */ 923 to->q_status = "5.7.1"; 924 return (EX_UNAVAILABLE); 925 } 926 # endif /* EXAMPLE_CODE */ 927 return (EX_OK); 928 } 929 /* 930 ** SETSIGNAL -- set a signal handler 931 ** 932 ** This is essentially old BSD "signal(3)". 933 */ 934 935 sigfunc_t 936 setsignal(sig, handler) 937 int sig; 938 sigfunc_t handler; 939 { 940 #if defined(SYS5SIGNALS) || defined(BSD4_3) || defined(_AUX_SOURCE) 941 return signal(sig, handler); 942 #else 943 struct sigaction n, o; 944 945 bzero(&n, sizeof n); 946 n.sa_handler = handler; 947 # ifdef SA_RESTART 948 n.sa_flags = SA_RESTART; 949 # endif 950 if (sigaction(sig, &n, &o) < 0) 951 return SIG_ERR; 952 return o.sa_handler; 953 #endif 954 } 955 /* 956 ** HOLDSIGS -- arrange to hold all signals 957 ** 958 ** Parameters: 959 ** none. 960 ** 961 ** Returns: 962 ** none. 963 ** 964 ** Side Effects: 965 ** Arranges that signals are held. 966 */ 967 968 void 969 holdsigs() 970 { 971 } 972 /* 973 ** RLSESIGS -- arrange to release all signals 974 ** 975 ** This undoes the effect of holdsigs. 976 ** 977 ** Parameters: 978 ** none. 979 ** 980 ** Returns: 981 ** none. 982 ** 983 ** Side Effects: 984 ** Arranges that signals are released. 985 */ 986 987 void 988 rlsesigs() 989 { 990 } 991 /* 992 ** INIT_MD -- do machine dependent initializations 993 ** 994 ** Systems that have global modes that should be set should do 995 ** them here rather than in main. 996 */ 997 998 #ifdef _AUX_SOURCE 999 # include <compat.h> 1000 #endif 1001 1002 void 1003 init_md(argc, argv) 1004 int argc; 1005 char **argv; 1006 { 1007 #ifdef _AUX_SOURCE 1008 setcompat(getcompat() | COMPAT_BSDPROT); 1009 #endif 1010 1011 #ifdef VENDOR_DEFAULT 1012 VendorCode = VENDOR_DEFAULT; 1013 #else 1014 VendorCode = VENDOR_BERKELEY; 1015 #endif 1016 } 1017 /* 1018 ** INIT_VENDOR_MACROS -- vendor-dependent macro initializations 1019 ** 1020 ** Called once, on startup. 1021 ** 1022 ** Parameters: 1023 ** e -- the global envelope. 1024 ** 1025 ** Returns: 1026 ** none. 1027 ** 1028 ** Side Effects: 1029 ** vendor-dependent. 1030 */ 1031 1032 void 1033 init_vendor_macros(e) 1034 register ENVELOPE *e; 1035 { 1036 } 1037 /* 1038 ** GETLA -- get the current load average 1039 ** 1040 ** This code stolen from la.c. 1041 ** 1042 ** Parameters: 1043 ** none. 1044 ** 1045 ** Returns: 1046 ** The current load average as an integer. 1047 ** 1048 ** Side Effects: 1049 ** none. 1050 */ 1051 1052 /* try to guess what style of load average we have */ 1053 #define LA_ZERO 1 /* always return load average as zero */ 1054 #define LA_INT 2 /* read kmem for avenrun; interpret as long */ 1055 #define LA_FLOAT 3 /* read kmem for avenrun; interpret as float */ 1056 #define LA_SUBR 4 /* call getloadavg */ 1057 #define LA_MACH 5 /* MACH load averages (as on NeXT boxes) */ 1058 #define LA_SHORT 6 /* read kmem for avenrun; interpret as short */ 1059 #define LA_PROCSTR 7 /* read string ("1.17") from /proc/loadavg */ 1060 #define LA_READKSYM 8 /* SVR4: use MIOC_READKSYM ioctl call */ 1061 #define LA_DGUX 9 /* special DGUX implementation */ 1062 #define LA_HPUX 10 /* special HPUX implementation */ 1063 1064 /* do guesses based on general OS type */ 1065 #ifndef LA_TYPE 1066 # define LA_TYPE LA_ZERO 1067 #endif 1068 1069 #ifndef FSHIFT 1070 # if defined(unixpc) 1071 # define FSHIFT 5 1072 # endif 1073 1074 # if defined(__alpha) || defined(IRIX) 1075 # define FSHIFT 10 1076 # endif 1077 1078 # if defined(_AIX3) 1079 # define FSHIFT 16 1080 # endif 1081 #endif 1082 1083 #ifndef FSHIFT 1084 # define FSHIFT 8 1085 #endif 1086 1087 #ifndef FSCALE 1088 # define FSCALE (1 << FSHIFT) 1089 #endif 1090 1091 #ifndef LA_AVENRUN 1092 # ifdef SYSTEM5 1093 # define LA_AVENRUN "avenrun" 1094 # else 1095 # define LA_AVENRUN "_avenrun" 1096 # endif 1097 #endif 1098 1099 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_FLOAT) || (LA_TYPE == LA_SHORT) 1100 1101 #include <nlist.h> 1102 1103 #ifdef IRIX64 1104 # define nlist nlist64 1105 #endif 1106 1107 /* _PATH_UNIX should be defined in <paths.h> */ 1108 #ifndef _PATH_UNIX 1109 # if defined(SYSTEM5) 1110 # define _PATH_UNIX "/unix" 1111 # else 1112 # define _PATH_UNIX "/vmunix" 1113 # endif 1114 #endif 1115 1116 struct nlist Nl[] = 1117 { 1118 { LA_AVENRUN }, 1119 #define X_AVENRUN 0 1120 { 0 }, 1121 }; 1122 1123 getla() 1124 { 1125 static int kmem = -1; 1126 #if LA_TYPE == LA_INT 1127 long avenrun[3]; 1128 #else 1129 # if LA_TYPE == LA_SHORT 1130 short avenrun[3]; 1131 # else 1132 double avenrun[3]; 1133 # endif 1134 #endif 1135 extern int errno; 1136 extern off_t lseek(); 1137 1138 if (kmem < 0) 1139 { 1140 kmem = open("/dev/kmem", 0, 0); 1141 if (kmem < 0) 1142 { 1143 if (tTd(3, 1)) 1144 printf("getla: open(/dev/kmem): %s\n", 1145 errstring(errno)); 1146 return (-1); 1147 } 1148 (void) fcntl(kmem, F_SETFD, 1); 1149 1150 #ifdef _AIX3 1151 if (knlist(Nl, 1, sizeof Nl[0]) < 0) 1152 #else 1153 if (nlist(_PATH_UNIX, Nl) < 0) 1154 #endif 1155 { 1156 if (tTd(3, 1)) 1157 printf("getla: nlist(%s): %s\n", _PATH_UNIX, 1158 errstring(errno)); 1159 return (-1); 1160 } 1161 if (Nl[X_AVENRUN].n_value == 0) 1162 { 1163 if (tTd(3, 1)) 1164 printf("getla: nlist(%s, %s) ==> 0\n", 1165 _PATH_UNIX, LA_AVENRUN); 1166 return (-1); 1167 } 1168 #ifdef NAMELISTMASK 1169 Nl[X_AVENRUN].n_value &= NAMELISTMASK; 1170 #endif 1171 } 1172 if (tTd(3, 20)) 1173 printf("getla: symbol address = %#x\n", Nl[X_AVENRUN].n_value); 1174 if (lseek(kmem, (off_t) Nl[X_AVENRUN].n_value, SEEK_SET) == -1 || 1175 read(kmem, (char *) avenrun, sizeof(avenrun)) < sizeof(avenrun)) 1176 { 1177 /* thank you Ian */ 1178 if (tTd(3, 1)) 1179 printf("getla: lseek or read: %s\n", errstring(errno)); 1180 return (-1); 1181 } 1182 # if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 1183 if (tTd(3, 5)) 1184 { 1185 printf("getla: avenrun = %d", avenrun[0]); 1186 if (tTd(3, 15)) 1187 printf(", %d, %d", avenrun[1], avenrun[2]); 1188 printf("\n"); 1189 } 1190 if (tTd(3, 1)) 1191 printf("getla: %d\n", (int) (avenrun[0] + FSCALE/2) >> FSHIFT); 1192 return ((int) (avenrun[0] + FSCALE/2) >> FSHIFT); 1193 # else /* LA_TYPE == LA_FLOAT */ 1194 if (tTd(3, 5)) 1195 { 1196 printf("getla: avenrun = %g", avenrun[0]); 1197 if (tTd(3, 15)) 1198 printf(", %g, %g", avenrun[1], avenrun[2]); 1199 printf("\n"); 1200 } 1201 if (tTd(3, 1)) 1202 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 1203 return ((int) (avenrun[0] + 0.5)); 1204 # endif 1205 } 1206 1207 #endif /* LA_TYPE == LA_INT or LA_SHORT or LA_FLOAT */ 1208 1209 #if LA_TYPE == LA_READKSYM 1210 1211 # include <sys/ksym.h> 1212 1213 getla() 1214 { 1215 static int kmem = -1; 1216 long avenrun[3]; 1217 extern int errno; 1218 struct mioc_rksym mirk; 1219 1220 if (kmem < 0) 1221 { 1222 kmem = open("/dev/kmem", 0, 0); 1223 if (kmem < 0) 1224 { 1225 if (tTd(3, 1)) 1226 printf("getla: open(/dev/kmem): %s\n", 1227 errstring(errno)); 1228 return (-1); 1229 } 1230 (void) fcntl(kmem, F_SETFD, 1); 1231 } 1232 mirk.mirk_symname = LA_AVENRUN; 1233 mirk.mirk_buf = avenrun; 1234 mirk.mirk_buflen = sizeof(avenrun); 1235 if (ioctl(kmem, MIOC_READKSYM, &mirk) < 0) 1236 { 1237 if (tTd(3, 1)) 1238 printf("getla: ioctl(MIOC_READKSYM) failed: %s\n", 1239 errstring(errno)); 1240 return -1; 1241 } 1242 if (tTd(3, 5)) 1243 { 1244 printf("getla: avenrun = %d", avenrun[0]); 1245 if (tTd(3, 15)) 1246 printf(", %d, %d", avenrun[1], avenrun[2]); 1247 printf("\n"); 1248 } 1249 if (tTd(3, 1)) 1250 printf("getla: %d\n", (int) (avenrun[0] + FSCALE/2) >> FSHIFT); 1251 return ((int) (avenrun[0] + FSCALE/2) >> FSHIFT); 1252 } 1253 1254 #endif /* LA_TYPE == LA_READKSYM */ 1255 1256 #if LA_TYPE == LA_DGUX 1257 1258 # include <sys/dg_sys_info.h> 1259 1260 int 1261 getla() 1262 { 1263 struct dg_sys_info_load_info load_info; 1264 1265 dg_sys_info((long *)&load_info, 1266 DG_SYS_INFO_LOAD_INFO_TYPE, DG_SYS_INFO_LOAD_VERSION_0); 1267 1268 if (tTd(3, 1)) 1269 printf("getla: %d\n", (int) (load_info.one_minute + 0.5)); 1270 1271 return((int) (load_info.one_minute + 0.5)); 1272 } 1273 1274 #endif /* LA_TYPE == LA_DGUX */ 1275 1276 #if LA_TYPE == LA_HPUX 1277 1278 /* forward declarations to keep gcc from complaining */ 1279 struct pst_dynamic; 1280 struct pst_status; 1281 struct pst_static; 1282 struct pst_vminfo; 1283 struct pst_diskinfo; 1284 struct pst_processor; 1285 struct pst_lv; 1286 struct pst_swapinfo; 1287 1288 # include <sys/param.h> 1289 # include <sys/pstat.h> 1290 1291 int 1292 getla() 1293 { 1294 struct pst_dynamic pstd; 1295 1296 if (pstat_getdynamic(&pstd, sizeof(struct pst_dynamic), 1297 (size_t) 1, 0) == -1) 1298 return 0; 1299 1300 if (tTd(3, 1)) 1301 printf("getla: %d\n", (int) (pstd.psd_avg_1_min + 0.5)); 1302 1303 return (int) (pstd.psd_avg_1_min + 0.5); 1304 } 1305 1306 #endif /* LA_TYPE == LA_HPUX */ 1307 1308 #if LA_TYPE == LA_SUBR 1309 1310 int 1311 getla() 1312 { 1313 double avenrun[3]; 1314 1315 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) < 0) 1316 { 1317 if (tTd(3, 1)) 1318 perror("getla: getloadavg failed:"); 1319 return (-1); 1320 } 1321 if (tTd(3, 1)) 1322 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 1323 return ((int) (avenrun[0] + 0.5)); 1324 } 1325 1326 #endif /* LA_TYPE == LA_SUBR */ 1327 1328 #if LA_TYPE == LA_MACH 1329 1330 /* 1331 ** This has been tested on NEXTSTEP release 2.1/3.X. 1332 */ 1333 1334 #if defined(NX_CURRENT_COMPILER_RELEASE) && NX_CURRENT_COMPILER_RELEASE > NX_COMPILER_RELEASE_3_0 1335 # include <mach/mach.h> 1336 #else 1337 # include <mach.h> 1338 #endif 1339 1340 getla() 1341 { 1342 processor_set_t default_set; 1343 kern_return_t error; 1344 unsigned int info_count; 1345 struct processor_set_basic_info info; 1346 host_t host; 1347 1348 error = processor_set_default(host_self(), &default_set); 1349 if (error != KERN_SUCCESS) 1350 return -1; 1351 info_count = PROCESSOR_SET_BASIC_INFO_COUNT; 1352 if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, 1353 &host, (processor_set_info_t)&info, 1354 &info_count) != KERN_SUCCESS) 1355 { 1356 return -1; 1357 } 1358 return (int) (info.load_average + (LOAD_SCALE / 2)) / LOAD_SCALE; 1359 } 1360 1361 #endif /* LA_TYPE == LA_MACH */ 1362 1363 #if LA_TYPE == LA_PROCSTR 1364 1365 /* 1366 ** Read /proc/loadavg for the load average. This is assumed to be 1367 ** in a format like "0.15 0.12 0.06". 1368 ** 1369 ** Initially intended for Linux. This has been in the kernel 1370 ** since at least 0.99.15. 1371 */ 1372 1373 # ifndef _PATH_LOADAVG 1374 # define _PATH_LOADAVG "/proc/loadavg" 1375 # endif 1376 1377 int 1378 getla() 1379 { 1380 double avenrun; 1381 register int result; 1382 FILE *fp; 1383 1384 fp = fopen(_PATH_LOADAVG, "r"); 1385 if (fp == NULL) 1386 { 1387 if (tTd(3, 1)) 1388 printf("getla: fopen(%s): %s\n", 1389 _PATH_LOADAVG, errstring(errno)); 1390 return -1; 1391 } 1392 result = fscanf(fp, "%lf", &avenrun); 1393 fclose(fp); 1394 if (result != 1) 1395 { 1396 if (tTd(3, 1)) 1397 printf("getla: fscanf() = %d: %s\n", 1398 result, errstring(errno)); 1399 return -1; 1400 } 1401 1402 if (tTd(3, 1)) 1403 printf("getla(): %.2f\n", avenrun); 1404 1405 return ((int) (avenrun + 0.5)); 1406 } 1407 1408 #endif /* LA_TYPE == LA_PROCSTR */ 1409 1410 #if LA_TYPE == LA_ZERO 1411 1412 getla() 1413 { 1414 if (tTd(3, 1)) 1415 printf("getla: ZERO\n"); 1416 return (0); 1417 } 1418 1419 #endif /* LA_TYPE == LA_ZERO */ 1420 1421 1422 /* 1423 * Copyright 1989 Massachusetts Institute of Technology 1424 * 1425 * Permission to use, copy, modify, distribute, and sell this software and its 1426 * documentation for any purpose is hereby granted without fee, provided that 1427 * the above copyright notice appear in all copies and that both that 1428 * copyright notice and this permission notice appear in supporting 1429 * documentation, and that the name of M.I.T. not be used in advertising or 1430 * publicity pertaining to distribution of the software without specific, 1431 * written prior permission. M.I.T. makes no representations about the 1432 * suitability of this software for any purpose. It is provided "as is" 1433 * without express or implied warranty. 1434 * 1435 * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL 1436 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T. 1437 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 1438 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 1439 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 1440 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 1441 * 1442 * Authors: Many and varied... 1443 */ 1444 1445 /* Non Apollo stuff removed by Don Lewis 11/15/93 */ 1446 #ifndef lint 1447 static char rcsid[] = "@(#)$Id: getloadavg.c,v 1.16 1991/06/21 12:51:15 paul Exp $"; 1448 #endif /* !lint */ 1449 1450 #ifdef apollo 1451 # undef volatile 1452 # include <apollo/base.h> 1453 1454 /* ARGSUSED */ 1455 int getloadavg( call_data ) 1456 caddr_t call_data; /* pointer to (double) return value */ 1457 { 1458 double *avenrun = (double *) call_data; 1459 int i; 1460 status_$t st; 1461 long loadav[3]; 1462 proc1_$get_loadav(loadav, &st); 1463 *avenrun = loadav[0] / (double) (1 << 16); 1464 return(0); 1465 } 1466 # endif /* apollo */ 1467 /* 1468 ** SHOULDQUEUE -- should this message be queued or sent? 1469 ** 1470 ** Compares the message cost to the load average to decide. 1471 ** 1472 ** Parameters: 1473 ** pri -- the priority of the message in question. 1474 ** ctime -- the message creation time. 1475 ** 1476 ** Returns: 1477 ** TRUE -- if this message should be queued up for the 1478 ** time being. 1479 ** FALSE -- if the load is low enough to send this message. 1480 ** 1481 ** Side Effects: 1482 ** none. 1483 */ 1484 1485 bool 1486 shouldqueue(pri, ctime) 1487 long pri; 1488 time_t ctime; 1489 { 1490 bool rval; 1491 1492 if (tTd(3, 30)) 1493 printf("shouldqueue: CurrentLA=%d, pri=%d: ", CurrentLA, pri); 1494 if (CurrentLA < QueueLA) 1495 { 1496 if (tTd(3, 30)) 1497 printf("FALSE (CurrentLA < QueueLA)\n"); 1498 return (FALSE); 1499 } 1500 if (CurrentLA >= RefuseLA) 1501 { 1502 if (tTd(3, 30)) 1503 printf("TRUE (CurrentLA >= RefuseLA)\n"); 1504 return (TRUE); 1505 } 1506 rval = pri > (QueueFactor / (CurrentLA - QueueLA + 1)); 1507 if (tTd(3, 30)) 1508 printf("%s (by calculation)\n", rval ? "TRUE" : "FALSE"); 1509 return rval; 1510 } 1511 /* 1512 ** REFUSECONNECTIONS -- decide if connections should be refused 1513 ** 1514 ** Parameters: 1515 ** none. 1516 ** 1517 ** Returns: 1518 ** TRUE if incoming SMTP connections should be refused 1519 ** (for now). 1520 ** FALSE if we should accept new work. 1521 ** 1522 ** Side Effects: 1523 ** none. 1524 */ 1525 1526 bool 1527 refuseconnections() 1528 { 1529 extern bool enoughspace(); 1530 1531 #ifdef XLA 1532 if (!xla_smtp_ok()) 1533 return TRUE; 1534 #endif 1535 1536 /* this is probably too simplistic */ 1537 return CurrentLA >= RefuseLA || !enoughspace(MinBlocksFree + 1); 1538 } 1539 /* 1540 ** SETPROCTITLE -- set process title for ps 1541 ** 1542 ** Parameters: 1543 ** fmt -- a printf style format string. 1544 ** a, b, c -- possible parameters to fmt. 1545 ** 1546 ** Returns: 1547 ** none. 1548 ** 1549 ** Side Effects: 1550 ** Clobbers argv of our main procedure so ps(1) will 1551 ** display the title. 1552 */ 1553 1554 #define SPT_NONE 0 /* don't use it at all */ 1555 #define SPT_REUSEARGV 1 /* cover argv with title information */ 1556 #define SPT_BUILTIN 2 /* use libc builtin */ 1557 #define SPT_PSTAT 3 /* use pstat(PSTAT_SETCMD, ...) */ 1558 #define SPT_PSSTRINGS 4 /* use PS_STRINGS->... */ 1559 #define SPT_SYSMIPS 5 /* use sysmips() supported by NEWS-OS 6 */ 1560 1561 #ifndef SPT_TYPE 1562 # define SPT_TYPE SPT_REUSEARGV 1563 #endif 1564 1565 #if SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN 1566 1567 # if SPT_TYPE == SPT_PSTAT 1568 # include <sys/pstat.h> 1569 # endif 1570 # if SPT_TYPE == SPT_PSSTRINGS 1571 # include <machine/vmparam.h> 1572 # include <sys/exec.h> 1573 # ifndef PS_STRINGS /* hmmmm.... apparently not available after all */ 1574 # undef SPT_TYPE 1575 # define SPT_TYPE SPT_REUSEARGV 1576 # else 1577 # ifndef NKPDE /* FreeBSD 2.0 */ 1578 # define NKPDE 63 1579 typedef unsigned int *pt_entry_t; 1580 # endif 1581 # endif 1582 # endif 1583 1584 # if SPT_TYPE == SPT_PSSTRINGS 1585 # define SETPROC_STATIC static 1586 # else 1587 # define SETPROC_STATIC 1588 # endif 1589 1590 # if SPT_TYPE == SPT_SYSMIPS 1591 # include <sys/sysmips.h> 1592 # include <sys/sysnews.h> 1593 # endif 1594 1595 # ifndef SPT_PADCHAR 1596 # define SPT_PADCHAR ' ' 1597 # endif 1598 1599 #endif /* SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN */ 1600 1601 #if SPT_TYPE != SPT_BUILTIN 1602 1603 /*VARARGS1*/ 1604 void 1605 # ifdef __STDC__ 1606 setproctitle(char *fmt, ...) 1607 # else 1608 setproctitle(fmt, va_alist) 1609 char *fmt; 1610 va_dcl 1611 # endif 1612 { 1613 # if SPT_TYPE != SPT_NONE 1614 register char *p; 1615 register int i; 1616 SETPROC_STATIC char buf[MAXLINE]; 1617 VA_LOCAL_DECL 1618 # if SPT_TYPE == SPT_PSTAT 1619 union pstun pst; 1620 # endif 1621 extern char **Argv; 1622 extern char *LastArgv; 1623 1624 p = buf; 1625 1626 /* print sendmail: heading for grep */ 1627 (void) strcpy(p, "sendmail: "); 1628 p += strlen(p); 1629 1630 /* print the argument string */ 1631 VA_START(fmt); 1632 (void) vsprintf(p, fmt, ap); 1633 VA_END; 1634 1635 i = strlen(buf); 1636 1637 # if SPT_TYPE == SPT_PSTAT 1638 pst.pst_command = buf; 1639 pstat(PSTAT_SETCMD, pst, i, 0, 0); 1640 # endif 1641 # if SPT_TYPE == SPT_PSSTRINGS 1642 PS_STRINGS->ps_nargvstr = 1; 1643 PS_STRINGS->ps_argvstr = buf; 1644 # endif 1645 # if SPT_TYPE == SPT_SYSMIPS 1646 sysmips(SONY_SYSNEWS, NEWS_SETPSARGS, buf); 1647 # endif 1648 # if SPT_TYPE == SPT_REUSEARGV 1649 if (i > LastArgv - Argv[0] - 2) 1650 { 1651 i = LastArgv - Argv[0] - 2; 1652 buf[i] = '\0'; 1653 } 1654 (void) strcpy(Argv[0], buf); 1655 p = &Argv[0][i]; 1656 while (p < LastArgv) 1657 *p++ = SPT_PADCHAR; 1658 Argv[1] = NULL; 1659 # endif 1660 # endif /* SPT_TYPE != SPT_NONE */ 1661 } 1662 1663 #endif /* SPT_TYPE != SPT_BUILTIN */ 1664 /* 1665 ** REAPCHILD -- pick up the body of my child, lest it become a zombie 1666 ** 1667 ** Parameters: 1668 ** sig -- the signal that got us here (unused). 1669 ** 1670 ** Returns: 1671 ** none. 1672 ** 1673 ** Side Effects: 1674 ** Picks up extant zombies. 1675 */ 1676 1677 void 1678 reapchild(sig) 1679 int sig; 1680 { 1681 int olderrno = errno; 1682 # ifdef HASWAITPID 1683 auto int status; 1684 int count; 1685 int pid; 1686 1687 count = 0; 1688 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) 1689 { 1690 if (count++ > 1000) 1691 { 1692 #ifdef LOG 1693 syslog(LOG_ALERT, "reapchild: waitpid loop: pid=%d, status=%x", 1694 pid, status); 1695 #endif 1696 break; 1697 } 1698 } 1699 # else 1700 # ifdef WNOHANG 1701 union wait status; 1702 1703 while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) 1704 continue; 1705 # else /* WNOHANG */ 1706 auto int status; 1707 1708 while (wait(&status) > 0) 1709 continue; 1710 # endif /* WNOHANG */ 1711 # endif 1712 # ifdef SYS5SIGNALS 1713 (void) setsignal(SIGCHLD, reapchild); 1714 # endif 1715 errno = olderrno; 1716 } 1717 /* 1718 ** PUTENV -- emulation of putenv() in terms of setenv() 1719 ** 1720 ** Not needed on Posix-compliant systems. 1721 ** This doesn't have full Posix semantics, but it's good enough 1722 ** for sendmail. 1723 ** 1724 ** Parameter: 1725 ** env -- the environment to put. 1726 ** 1727 ** Returns: 1728 ** none. 1729 */ 1730 1731 #ifdef NEEDPUTENV 1732 1733 void 1734 putenv(env) 1735 char *env; 1736 { 1737 char *p; 1738 int l; 1739 char nbuf[100]; 1740 1741 p = strchr(env, '='); 1742 if (p == NULL) 1743 return; 1744 l = p - env; 1745 if (l > sizeof nbuf - 1) 1746 l = sizeof nbuf - 1; 1747 bcopy(env, nbuf, l); 1748 nbuf[l] = '\0'; 1749 setenv(nbuf, ++p, 1); 1750 } 1751 1752 #endif 1753 /* 1754 ** UNSETENV -- remove a variable from the environment 1755 ** 1756 ** Not needed on newer systems. 1757 ** 1758 ** Parameters: 1759 ** name -- the string name of the environment variable to be 1760 ** deleted from the current environment. 1761 ** 1762 ** Returns: 1763 ** none. 1764 ** 1765 ** Globals: 1766 ** environ -- a pointer to the current environment. 1767 ** 1768 ** Side Effects: 1769 ** Modifies environ. 1770 */ 1771 1772 #ifndef HASUNSETENV 1773 1774 void 1775 unsetenv(name) 1776 char *name; 1777 { 1778 extern char **environ; 1779 register char **pp; 1780 int len = strlen(name); 1781 1782 for (pp = environ; *pp != NULL; pp++) 1783 { 1784 if (strncmp(name, *pp, len) == 0 && 1785 ((*pp)[len] == '=' || (*pp)[len] == '\0')) 1786 break; 1787 } 1788 1789 for (; *pp != NULL; pp++) 1790 *pp = pp[1]; 1791 } 1792 1793 #endif 1794 /* 1795 ** GETDTABLESIZE -- return number of file descriptors 1796 ** 1797 ** Only on non-BSD systems 1798 ** 1799 ** Parameters: 1800 ** none 1801 ** 1802 ** Returns: 1803 ** size of file descriptor table 1804 ** 1805 ** Side Effects: 1806 ** none 1807 */ 1808 1809 #ifdef SOLARIS 1810 # include <sys/resource.h> 1811 #endif 1812 1813 int 1814 getdtsize() 1815 { 1816 #ifdef RLIMIT_NOFILE 1817 struct rlimit rl; 1818 1819 if (getrlimit(RLIMIT_NOFILE, &rl) >= 0) 1820 return rl.rlim_cur; 1821 #endif 1822 1823 # ifdef HASGETDTABLESIZE 1824 return getdtablesize(); 1825 # else 1826 # ifdef _SC_OPEN_MAX 1827 return sysconf(_SC_OPEN_MAX); 1828 # else 1829 return NOFILE; 1830 # endif 1831 # endif 1832 } 1833 /* 1834 ** UNAME -- get the UUCP name of this system. 1835 */ 1836 1837 #ifndef HASUNAME 1838 1839 int 1840 uname(name) 1841 struct utsname *name; 1842 { 1843 FILE *file; 1844 char *n; 1845 1846 name->nodename[0] = '\0'; 1847 1848 /* try /etc/whoami -- one line with the node name */ 1849 if ((file = fopen("/etc/whoami", "r")) != NULL) 1850 { 1851 (void) fgets(name->nodename, NODE_LENGTH + 1, file); 1852 (void) fclose(file); 1853 n = strchr(name->nodename, '\n'); 1854 if (n != NULL) 1855 *n = '\0'; 1856 if (name->nodename[0] != '\0') 1857 return (0); 1858 } 1859 1860 /* try /usr/include/whoami.h -- has a #define somewhere */ 1861 if ((file = fopen("/usr/include/whoami.h", "r")) != NULL) 1862 { 1863 char buf[MAXLINE]; 1864 1865 while (fgets(buf, MAXLINE, file) != NULL) 1866 if (sscanf(buf, "#define sysname \"%*[^\"]\"", 1867 NODE_LENGTH, name->nodename) > 0) 1868 break; 1869 (void) fclose(file); 1870 if (name->nodename[0] != '\0') 1871 return (0); 1872 } 1873 1874 #ifdef TRUST_POPEN 1875 /* 1876 ** Popen is known to have security holes. 1877 */ 1878 1879 /* try uuname -l to return local name */ 1880 if ((file = popen("uuname -l", "r")) != NULL) 1881 { 1882 (void) fgets(name, NODE_LENGTH + 1, file); 1883 (void) pclose(file); 1884 n = strchr(name, '\n'); 1885 if (n != NULL) 1886 *n = '\0'; 1887 if (name->nodename[0] != '\0') 1888 return (0); 1889 } 1890 #endif 1891 1892 return (-1); 1893 } 1894 #endif /* HASUNAME */ 1895 /* 1896 ** INITGROUPS -- initialize groups 1897 ** 1898 ** Stub implementation for System V style systems 1899 */ 1900 1901 #ifndef HASINITGROUPS 1902 1903 initgroups(name, basegid) 1904 char *name; 1905 int basegid; 1906 { 1907 return 0; 1908 } 1909 1910 #endif 1911 /* 1912 ** SETSID -- set session id (for non-POSIX systems) 1913 */ 1914 1915 #ifndef HASSETSID 1916 1917 pid_t 1918 setsid __P ((void)) 1919 { 1920 #ifdef TIOCNOTTY 1921 int fd; 1922 1923 fd = open("/dev/tty", O_RDWR, 0); 1924 if (fd >= 0) 1925 { 1926 (void) ioctl(fd, (int) TIOCNOTTY, (char *) 0); 1927 (void) close(fd); 1928 } 1929 #endif /* TIOCNOTTY */ 1930 # ifdef SYS5SETPGRP 1931 return setpgrp(); 1932 # else 1933 return setpgid(0, getpid()); 1934 # endif 1935 } 1936 1937 #endif 1938 /* 1939 ** FSYNC -- dummy fsync 1940 */ 1941 1942 #ifdef NEEDFSYNC 1943 1944 fsync(fd) 1945 int fd; 1946 { 1947 # ifdef O_SYNC 1948 return fcntl(fd, F_SETFL, O_SYNC); 1949 # else 1950 /* nothing we can do */ 1951 return 0; 1952 # endif 1953 } 1954 1955 #endif 1956 /* 1957 ** DGUX_INET_ADDR -- inet_addr for DG/UX 1958 ** 1959 ** Data General DG/UX version of inet_addr returns a struct in_addr 1960 ** instead of a long. This patches things. Only needed on versions 1961 ** prior to 5.4.3. 1962 */ 1963 1964 #ifdef DGUX_5_4_2 1965 1966 #undef inet_addr 1967 1968 long 1969 dgux_inet_addr(host) 1970 char *host; 1971 { 1972 struct in_addr haddr; 1973 1974 haddr = inet_addr(host); 1975 return haddr.s_addr; 1976 } 1977 1978 #endif 1979 /* 1980 ** GETOPT -- for old systems or systems with bogus implementations 1981 */ 1982 1983 #ifdef NEEDGETOPT 1984 1985 /* 1986 * Copyright (c) 1985 Regents of the University of California. 1987 * All rights reserved. The Berkeley software License Agreement 1988 * specifies the terms and conditions for redistribution. 1989 */ 1990 1991 1992 /* 1993 ** this version hacked to add `atend' flag to allow state machine 1994 ** to reset if invoked by the program to scan args for a 2nd time 1995 */ 1996 1997 #if defined(LIBC_SCCS) && !defined(lint) 1998 static char sccsid[] = "@(#)getopt.c 4.3 (Berkeley) 3/9/86"; 1999 #endif /* LIBC_SCCS and not lint */ 2000 2001 #include <stdio.h> 2002 2003 /* 2004 * get option letter from argument vector 2005 */ 2006 #ifdef _CONVEX_SOURCE 2007 extern int optind, opterr, optopt; 2008 extern char *optarg; 2009 #else 2010 int opterr = 1; /* if error message should be printed */ 2011 int optind = 1; /* index into parent argv vector */ 2012 int optopt = 0; /* character checked for validity */ 2013 char *optarg = NULL; /* argument associated with option */ 2014 #endif 2015 2016 #define BADCH (int)'?' 2017 #define EMSG "" 2018 #define tell(s) if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \ 2019 fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);} 2020 2021 getopt(nargc,nargv,ostr) 2022 int nargc; 2023 char *const *nargv; 2024 const char *ostr; 2025 { 2026 static char *place = EMSG; /* option letter processing */ 2027 static char atend = 0; 2028 register char *oli; /* option letter list index */ 2029 2030 if (atend) { 2031 atend = 0; 2032 place = EMSG; 2033 } 2034 if(!*place) { /* update scanning pointer */ 2035 if (optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) { 2036 atend++; 2037 return(EOF); 2038 } 2039 if (*place == '-') { /* found "--" */ 2040 ++optind; 2041 atend++; 2042 return(EOF); 2043 } 2044 } /* option letter okay? */ 2045 if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr,optopt))) { 2046 if (!*place) ++optind; 2047 tell(": illegal option -- "); 2048 } 2049 if (*++oli != ':') { /* don't need argument */ 2050 optarg = NULL; 2051 if (!*place) ++optind; 2052 } 2053 else { /* need an argument */ 2054 if (*place) optarg = place; /* no white space */ 2055 else if (nargc <= ++optind) { /* no arg */ 2056 place = EMSG; 2057 tell(": option requires an argument -- "); 2058 } 2059 else optarg = nargv[optind]; /* white space */ 2060 place = EMSG; 2061 ++optind; 2062 } 2063 return(optopt); /* dump back option letter */ 2064 } 2065 2066 #endif 2067 /* 2068 ** VFPRINTF, VSPRINTF -- for old 4.3 BSD systems missing a real version 2069 */ 2070 2071 #ifdef NEEDVPRINTF 2072 2073 #define MAXARG 16 2074 2075 vfprintf(fp, fmt, ap) 2076 FILE * fp; 2077 char * fmt; 2078 char ** ap; 2079 { 2080 char * bp[MAXARG]; 2081 int i = 0; 2082 2083 while (*ap && i < MAXARG) 2084 bp[i++] = *ap++; 2085 fprintf(fp, fmt, bp[0], bp[1], bp[2], bp[3], 2086 bp[4], bp[5], bp[6], bp[7], 2087 bp[8], bp[9], bp[10], bp[11], 2088 bp[12], bp[13], bp[14], bp[15]); 2089 } 2090 2091 vsprintf(s, fmt, ap) 2092 char * s; 2093 char * fmt; 2094 char ** ap; 2095 { 2096 char * bp[MAXARG]; 2097 int i = 0; 2098 2099 while (*ap && i < MAXARG) 2100 bp[i++] = *ap++; 2101 sprintf(s, fmt, bp[0], bp[1], bp[2], bp[3], 2102 bp[4], bp[5], bp[6], bp[7], 2103 bp[8], bp[9], bp[10], bp[11], 2104 bp[12], bp[13], bp[14], bp[15]); 2105 } 2106 2107 #endif 2108 /* 2109 ** USERSHELLOK -- tell if a user's shell is ok for unrestricted use 2110 ** 2111 ** Parameters: 2112 ** shell -- the user's shell from /etc/passwd 2113 ** 2114 ** Returns: 2115 ** TRUE -- if it is ok to use this for unrestricted access. 2116 ** FALSE -- if the shell is restricted. 2117 */ 2118 2119 #if !HASGETUSERSHELL 2120 2121 # ifndef _PATH_SHELLS 2122 # define _PATH_SHELLS "/etc/shells" 2123 # endif 2124 2125 char *DefaultUserShells[] = 2126 { 2127 "/bin/sh", /* standard shell */ 2128 "/usr/bin/sh", 2129 "/bin/csh", /* C shell */ 2130 "/usr/bin/csh", 2131 #ifdef __hpux 2132 # ifdef V4FS 2133 "/usr/bin/rsh", /* restricted Bourne shell */ 2134 "/usr/bin/ksh", /* Korn shell */ 2135 "/usr/bin/rksh", /* restricted Korn shell */ 2136 "/usr/bin/pam", 2137 "/usr/bin/keysh", /* key shell (extended Korn shell) */ 2138 "/usr/bin/posix/sh", 2139 # else 2140 "/bin/rsh", /* restricted Bourne shell */ 2141 "/bin/ksh", /* Korn shell */ 2142 "/bin/rksh", /* restricted Korn shell */ 2143 "/bin/pam", 2144 "/usr/bin/keysh", /* key shell (extended Korn shell) */ 2145 "/bin/posix/sh", 2146 # endif 2147 #endif 2148 #ifdef _AIX3 2149 "/bin/ksh", /* Korn shell */ 2150 "/usr/bin/ksh", 2151 "/bin/tsh", /* trusted shell */ 2152 "/usr/bin/tsh", 2153 "/bin/bsh", /* Bourne shell */ 2154 "/usr/bin/bsh", 2155 #endif 2156 NULL 2157 }; 2158 2159 #endif 2160 2161 #define WILDCARD_SHELL "/SENDMAIL/ANY/SHELL/" 2162 2163 bool 2164 usershellok(shell) 2165 char *shell; 2166 { 2167 #if HASGETUSERSHELL 2168 register char *p; 2169 extern char *getusershell(); 2170 2171 if (shell == NULL || shell[0] == '\0' || ConfigLevel <= 1) 2172 return TRUE; 2173 2174 setusershell(); 2175 while ((p = getusershell()) != NULL) 2176 if (strcmp(p, shell) == 0 || strcmp(p, WILDCARD_SHELL) == 0) 2177 break; 2178 endusershell(); 2179 return p != NULL; 2180 #else 2181 register FILE *shellf; 2182 char buf[MAXLINE]; 2183 2184 if (shell == NULL || shell[0] == '\0') 2185 return TRUE; 2186 2187 shellf = fopen(_PATH_SHELLS, "r"); 2188 if (shellf == NULL) 2189 { 2190 /* no /etc/shells; see if it is one of the std shells */ 2191 char **d; 2192 2193 for (d = DefaultUserShells; *d != NULL; d++) 2194 { 2195 if (strcmp(shell, *d) == 0) 2196 return TRUE; 2197 } 2198 return FALSE; 2199 } 2200 2201 while (fgets(buf, sizeof buf, shellf) != NULL) 2202 { 2203 register char *p, *q; 2204 2205 p = buf; 2206 while (*p != '\0' && *p != '#' && *p != '/') 2207 p++; 2208 if (*p == '#' || *p == '\0') 2209 continue; 2210 q = p; 2211 while (*p != '\0' && *p != '#' && !isspace(*p)) 2212 p++; 2213 *p = '\0'; 2214 if (strcmp(shell, q) == 0 || strcmp(WILDCARD_SHELL, q) == 0) 2215 { 2216 fclose(shellf); 2217 return TRUE; 2218 } 2219 } 2220 fclose(shellf); 2221 return FALSE; 2222 #endif 2223 } 2224 /* 2225 ** FREESPACE -- see how much free space is on the queue filesystem 2226 ** 2227 ** Only implemented if you have statfs. 2228 ** 2229 ** Parameters: 2230 ** dir -- the directory in question. 2231 ** bsize -- a variable into which the filesystem 2232 ** block size is stored. 2233 ** 2234 ** Returns: 2235 ** The number of bytes free on the queue filesystem. 2236 ** -1 if the statfs call fails. 2237 ** 2238 ** Side effects: 2239 ** Puts the filesystem block size into bsize. 2240 */ 2241 2242 /* statfs types */ 2243 #define SFS_NONE 0 /* no statfs implementation */ 2244 #define SFS_USTAT 1 /* use ustat */ 2245 #define SFS_4ARGS 2 /* use four-argument statfs call */ 2246 #define SFS_VFS 3 /* use <sys/vfs.h> implementation */ 2247 #define SFS_MOUNT 4 /* use <sys/mount.h> implementation */ 2248 #define SFS_STATFS 5 /* use <sys/statfs.h> implementation */ 2249 #define SFS_STATVFS 6 /* use <sys/statvfs.h> implementation */ 2250 2251 #ifndef SFS_TYPE 2252 # define SFS_TYPE SFS_NONE 2253 #endif 2254 2255 #if SFS_TYPE == SFS_USTAT 2256 # include <ustat.h> 2257 #endif 2258 #if SFS_TYPE == SFS_4ARGS || SFS_TYPE == SFS_STATFS 2259 # include <sys/statfs.h> 2260 #endif 2261 #if SFS_TYPE == SFS_VFS 2262 # include <sys/vfs.h> 2263 #endif 2264 #if SFS_TYPE == SFS_MOUNT 2265 # include <sys/mount.h> 2266 #endif 2267 #if SFS_TYPE == SFS_STATVFS 2268 # include <sys/statvfs.h> 2269 #endif 2270 2271 long 2272 freespace(dir, bsize) 2273 char *dir; 2274 long *bsize; 2275 { 2276 #if SFS_TYPE != SFS_NONE 2277 # if SFS_TYPE == SFS_USTAT 2278 struct ustat fs; 2279 struct stat statbuf; 2280 # define FSBLOCKSIZE DEV_BSIZE 2281 # define SFS_BAVAIL f_tfree 2282 # else 2283 # if defined(ultrix) 2284 struct fs_data fs; 2285 # define SFS_BAVAIL fd_bfreen 2286 # define FSBLOCKSIZE 1024L 2287 # else 2288 # if SFS_TYPE == SFS_STATVFS 2289 struct statvfs fs; 2290 # define FSBLOCKSIZE fs.f_frsize 2291 # else 2292 struct statfs fs; 2293 # define FSBLOCKSIZE fs.f_bsize 2294 # endif 2295 # endif 2296 # endif 2297 # ifndef SFS_BAVAIL 2298 # define SFS_BAVAIL f_bavail 2299 # endif 2300 2301 # if SFS_TYPE == SFS_USTAT 2302 if (stat(dir, &statbuf) == 0 && ustat(statbuf.st_dev, &fs) == 0) 2303 # else 2304 # if SFS_TYPE == SFS_4ARGS 2305 if (statfs(dir, &fs, sizeof fs, 0) == 0) 2306 # else 2307 # if SFS_TYPE == SFS_STATVFS 2308 if (statvfs(dir, &fs) == 0) 2309 # else 2310 # if defined(ultrix) 2311 if (statfs(dir, &fs) > 0) 2312 # else 2313 if (statfs(dir, &fs) == 0) 2314 # endif 2315 # endif 2316 # endif 2317 # endif 2318 { 2319 if (bsize != NULL) 2320 *bsize = FSBLOCKSIZE; 2321 return (fs.SFS_BAVAIL); 2322 } 2323 #endif 2324 return (-1); 2325 } 2326 /* 2327 ** ENOUGHSPACE -- check to see if there is enough free space on the queue fs 2328 ** 2329 ** Only implemented if you have statfs. 2330 ** 2331 ** Parameters: 2332 ** msize -- the size to check against. If zero, we don't yet 2333 ** know how big the message will be, so just check for 2334 ** a "reasonable" amount. 2335 ** 2336 ** Returns: 2337 ** TRUE if there is enough space. 2338 ** FALSE otherwise. 2339 */ 2340 2341 bool 2342 enoughspace(msize) 2343 long msize; 2344 { 2345 long bfree, bsize; 2346 2347 if (MinBlocksFree <= 0 && msize <= 0) 2348 { 2349 if (tTd(4, 80)) 2350 printf("enoughspace: no threshold\n"); 2351 return TRUE; 2352 } 2353 2354 if ((bfree = freespace(QueueDir, &bsize)) >= 0) 2355 { 2356 if (tTd(4, 80)) 2357 printf("enoughspace: bavail=%ld, need=%ld\n", 2358 bfree, msize); 2359 2360 /* convert msize to block count */ 2361 msize = msize / bsize + 1; 2362 if (MinBlocksFree >= 0) 2363 msize += MinBlocksFree; 2364 2365 if (bfree < msize) 2366 { 2367 #ifdef LOG 2368 if (LogLevel > 0) 2369 syslog(LOG_ALERT, 2370 "%s: low on space (have %ld, %s needs %ld in %s)", 2371 CurEnv->e_id == NULL ? "[NOQUEUE]" : CurEnv->e_id, 2372 bfree, 2373 CurHostName == NULL ? "SMTP-DAEMON" : CurHostName, 2374 msize, QueueDir); 2375 #endif 2376 return FALSE; 2377 } 2378 } 2379 else if (tTd(4, 80)) 2380 printf("enoughspace failure: min=%ld, need=%ld: %s\n", 2381 MinBlocksFree, msize, errstring(errno)); 2382 return TRUE; 2383 } 2384 /* 2385 ** TRANSIENTERROR -- tell if an error code indicates a transient failure 2386 ** 2387 ** This looks at an errno value and tells if this is likely to 2388 ** go away if retried later. 2389 ** 2390 ** Parameters: 2391 ** err -- the errno code to classify. 2392 ** 2393 ** Returns: 2394 ** TRUE if this is probably transient. 2395 ** FALSE otherwise. 2396 */ 2397 2398 bool 2399 transienterror(err) 2400 int err; 2401 { 2402 switch (err) 2403 { 2404 case EIO: /* I/O error */ 2405 case ENXIO: /* Device not configured */ 2406 case EAGAIN: /* Resource temporarily unavailable */ 2407 case ENOMEM: /* Cannot allocate memory */ 2408 case ENODEV: /* Operation not supported by device */ 2409 case ENFILE: /* Too many open files in system */ 2410 case EMFILE: /* Too many open files */ 2411 case ENOSPC: /* No space left on device */ 2412 #ifdef ETIMEDOUT 2413 case ETIMEDOUT: /* Connection timed out */ 2414 #endif 2415 #ifdef ESTALE 2416 case ESTALE: /* Stale NFS file handle */ 2417 #endif 2418 #ifdef ENETDOWN 2419 case ENETDOWN: /* Network is down */ 2420 #endif 2421 #ifdef ENETUNREACH 2422 case ENETUNREACH: /* Network is unreachable */ 2423 #endif 2424 #ifdef ENETRESET 2425 case ENETRESET: /* Network dropped connection on reset */ 2426 #endif 2427 #ifdef ECONNABORTED 2428 case ECONNABORTED: /* Software caused connection abort */ 2429 #endif 2430 #ifdef ECONNRESET 2431 case ECONNRESET: /* Connection reset by peer */ 2432 #endif 2433 #ifdef ENOBUFS 2434 case ENOBUFS: /* No buffer space available */ 2435 #endif 2436 #ifdef ESHUTDOWN 2437 case ESHUTDOWN: /* Can't send after socket shutdown */ 2438 #endif 2439 #ifdef ECONNREFUSED 2440 case ECONNREFUSED: /* Connection refused */ 2441 #endif 2442 #ifdef EHOSTDOWN 2443 case EHOSTDOWN: /* Host is down */ 2444 #endif 2445 #ifdef EHOSTUNREACH 2446 case EHOSTUNREACH: /* No route to host */ 2447 #endif 2448 #ifdef EDQUOT 2449 case EDQUOT: /* Disc quota exceeded */ 2450 #endif 2451 #ifdef EPROCLIM 2452 case EPROCLIM: /* Too many processes */ 2453 #endif 2454 #ifdef EUSERS 2455 case EUSERS: /* Too many users */ 2456 #endif 2457 #ifdef EDEADLK 2458 case EDEADLK: /* Resource deadlock avoided */ 2459 #endif 2460 #ifdef EISCONN 2461 case EISCONN: /* Socket already connected */ 2462 #endif 2463 #ifdef EINPROGRESS 2464 case EINPROGRESS: /* Operation now in progress */ 2465 #endif 2466 #ifdef EALREADY 2467 case EALREADY: /* Operation already in progress */ 2468 #endif 2469 #ifdef EADDRINUSE 2470 case EADDRINUSE: /* Address already in use */ 2471 #endif 2472 #ifdef EADDRNOTAVAIL 2473 case EADDRNOTAVAIL: /* Can't assign requested address */ 2474 #endif 2475 #ifdef ETXTBSY 2476 case ETXTBSY: /* (Apollo) file locked */ 2477 #endif 2478 #if defined(ENOSR) && (!defined(ENOBUFS) || (ENOBUFS != ENOSR)) 2479 case ENOSR: /* Out of streams resources */ 2480 #endif 2481 return TRUE; 2482 } 2483 2484 /* nope, must be permanent */ 2485 return FALSE; 2486 } 2487 /* 2488 ** LOCKFILE -- lock a file using flock or (shudder) fcntl locking 2489 ** 2490 ** Parameters: 2491 ** fd -- the file descriptor of the file. 2492 ** filename -- the file name (for error messages). 2493 ** ext -- the filename extension. 2494 ** type -- type of the lock. Bits can be: 2495 ** LOCK_EX -- exclusive lock. 2496 ** LOCK_NB -- non-blocking. 2497 ** 2498 ** Returns: 2499 ** TRUE if the lock was acquired. 2500 ** FALSE otherwise. 2501 */ 2502 2503 bool 2504 lockfile(fd, filename, ext, type) 2505 int fd; 2506 char *filename; 2507 char *ext; 2508 int type; 2509 { 2510 # if !HASFLOCK 2511 int action; 2512 struct flock lfd; 2513 2514 if (ext == NULL) 2515 ext = ""; 2516 2517 bzero(&lfd, sizeof lfd); 2518 if (bitset(LOCK_UN, type)) 2519 lfd.l_type = F_UNLCK; 2520 else if (bitset(LOCK_EX, type)) 2521 lfd.l_type = F_WRLCK; 2522 else 2523 lfd.l_type = F_RDLCK; 2524 2525 if (bitset(LOCK_NB, type)) 2526 action = F_SETLK; 2527 else 2528 action = F_SETLKW; 2529 2530 if (tTd(55, 60)) 2531 printf("lockfile(%s%s, action=%d, type=%d): ", 2532 filename, ext, action, lfd.l_type); 2533 2534 if (fcntl(fd, action, &lfd) >= 0) 2535 { 2536 if (tTd(55, 60)) 2537 printf("SUCCESS\n"); 2538 return TRUE; 2539 } 2540 2541 if (tTd(55, 60)) 2542 printf("(%s) ", errstring(errno)); 2543 2544 /* 2545 ** On SunOS, if you are testing using -oQ/tmp/mqueue or 2546 ** -oA/tmp/aliases or anything like that, and /tmp is mounted 2547 ** as type "tmp" (that is, served from swap space), the 2548 ** previous fcntl will fail with "Invalid argument" errors. 2549 ** Since this is fairly common during testing, we will assume 2550 ** that this indicates that the lock is successfully grabbed. 2551 */ 2552 2553 if (errno == EINVAL) 2554 { 2555 if (tTd(55, 60)) 2556 printf("SUCCESS\n"); 2557 return TRUE; 2558 } 2559 2560 if (!bitset(LOCK_NB, type) || (errno != EACCES && errno != EAGAIN)) 2561 { 2562 int omode = -1; 2563 # ifdef F_GETFL 2564 int oerrno = errno; 2565 2566 (void) fcntl(fd, F_GETFL, &omode); 2567 errno = oerrno; 2568 # endif 2569 syserr("cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 2570 filename, ext, fd, type, omode, geteuid()); 2571 } 2572 # else 2573 if (ext == NULL) 2574 ext = ""; 2575 2576 if (tTd(55, 60)) 2577 printf("lockfile(%s%s, type=%o): ", filename, ext, type); 2578 2579 if (flock(fd, type) >= 0) 2580 { 2581 if (tTd(55, 60)) 2582 printf("SUCCESS\n"); 2583 return TRUE; 2584 } 2585 2586 if (tTd(55, 60)) 2587 printf("(%s) ", errstring(errno)); 2588 2589 if (!bitset(LOCK_NB, type) || errno != EWOULDBLOCK) 2590 { 2591 int omode = -1; 2592 # ifdef F_GETFL 2593 int oerrno = errno; 2594 2595 (void) fcntl(fd, F_GETFL, &omode); 2596 errno = oerrno; 2597 # endif 2598 syserr("cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 2599 filename, ext, fd, type, omode, geteuid()); 2600 } 2601 # endif 2602 if (tTd(55, 60)) 2603 printf("FAIL\n"); 2604 return FALSE; 2605 } 2606 /* 2607 ** CHOWNSAFE -- tell if chown is "safe" (executable only by root) 2608 ** 2609 ** Parameters: 2610 ** fd -- the file descriptor to check. 2611 ** 2612 ** Returns: 2613 ** TRUE -- if only root can chown the file to an arbitrary 2614 ** user. 2615 ** FALSE -- if an arbitrary user can give away a file. 2616 */ 2617 2618 bool 2619 chownsafe(fd) 2620 int fd; 2621 { 2622 #ifdef __hpux 2623 char *s; 2624 int tfd; 2625 uid_t o_uid, o_euid; 2626 gid_t o_gid, o_egid; 2627 bool rval; 2628 struct stat stbuf; 2629 2630 o_uid = getuid(); 2631 o_euid = geteuid(); 2632 o_gid = getgid(); 2633 o_egid = getegid(); 2634 fstat(fd, &stbuf); 2635 setresuid(stbuf.st_uid, stbuf.st_uid, -1); 2636 setresgid(stbuf.st_gid, stbuf.st_gid, -1); 2637 s = tmpnam(NULL); 2638 tfd = open(s, O_RDONLY|O_CREAT, 0600); 2639 rval = fchown(tfd, DefUid, DefGid) != 0; 2640 close(tfd); 2641 unlink(s); 2642 setresuid(o_uid, o_euid, -1); 2643 setresgid(o_gid, o_egid, -1); 2644 return rval; 2645 #else 2646 # ifdef _POSIX_CHOWN_RESTRICTED 2647 # if _POSIX_CHOWN_RESTRICTED == -1 2648 return FALSE; 2649 # else 2650 return TRUE; 2651 # endif 2652 # else 2653 # ifdef _PC_CHOWN_RESTRICTED 2654 int rval; 2655 2656 /* 2657 ** Some systems (e.g., SunOS) seem to have the call and the 2658 ** #define _PC_CHOWN_RESTRICTED, but don't actually implement 2659 ** the call. This heuristic checks for that. 2660 */ 2661 2662 errno = 0; 2663 rval = fpathconf(fd, _PC_CHOWN_RESTRICTED); 2664 if (errno == 0) 2665 return rval > 0; 2666 # endif 2667 # ifdef BSD 2668 return TRUE; 2669 # else 2670 return FALSE; 2671 # endif 2672 # endif 2673 #endif 2674 } 2675 /* 2676 ** RESETLIMITS -- reset system controlled resource limits 2677 ** 2678 ** This is to avoid denial-of-service attacks 2679 ** 2680 ** Parameters: 2681 ** none 2682 ** 2683 ** Returns: 2684 ** none 2685 */ 2686 2687 #if HASSETRLIMIT 2688 # include <sys/resource.h> 2689 #endif 2690 2691 void 2692 resetlimits() 2693 { 2694 #if HASSETRLIMIT 2695 struct rlimit lim; 2696 2697 lim.rlim_cur = lim.rlim_max = RLIM_INFINITY; 2698 (void) setrlimit(RLIMIT_CPU, &lim); 2699 (void) setrlimit(RLIMIT_FSIZE, &lim); 2700 #else 2701 # if HASULIMIT 2702 (void) ulimit(2, 0x3fffff); 2703 # endif 2704 #endif 2705 } 2706 /* 2707 ** GETCFNAME -- return the name of the .cf file. 2708 ** 2709 ** Some systems (e.g., NeXT) determine this dynamically. 2710 */ 2711 2712 char * 2713 getcfname() 2714 { 2715 int i; 2716 static char cbuf[200]; 2717 2718 if (ConfFile != NULL) 2719 return ConfFile; 2720 #ifdef NETINFO 2721 { 2722 extern char *ni_propval(); 2723 char *cflocation; 2724 2725 cflocation = ni_propval("/locations", NULL, "sendmail", 2726 "sendmail.cf", '\0'); 2727 if (cflocation != NULL) 2728 return cflocation; 2729 } 2730 #endif 2731 2732 #ifdef TRY_VERSIONED_CF_NAME 2733 /* 2734 ** Try sendmail.8.6.12.cf, then sendmail.8.6.cf, then 2735 ** sendmail.8.cf, and finally sendmail.cf. 2736 ** 2737 ** I suppose it should really try a search path here -- 2738 ** e.g., /etc/sendmail.cf, /etc/mail/sendmail.cf, 2739 ** /usr/lib/sendmail.cf, and so forth. 2740 */ 2741 2742 strcpy(cbuf, _PATH_SENDMAILCF); 2743 i = strlen(cbuf); 2744 if (strcmp(&cbuf[i - 3], ".cf") == 0) 2745 { 2746 char *p; 2747 extern char Version[]; 2748 2749 strcpy(&cbuf[i - 2], Version); 2750 p = strchr(&cbuf[i - 2], '/'); 2751 if (p != NULL) 2752 *p = '\0'; 2753 p = &cbuf[strlen(cbuf)]; 2754 do 2755 { 2756 int fd; 2757 2758 strcpy(p, ".cf"); 2759 if ((fd = open(cbuf, O_RDONLY, 0)) >= 0) 2760 { 2761 close(fd); 2762 return cbuf; 2763 } 2764 *p = '\0'; 2765 } while ((p = strrchr(&cbuf[i - 2], '.')) != NULL); 2766 } 2767 #endif 2768 return _PATH_SENDMAILCF; 2769 } 2770 /* 2771 ** SETVENDOR -- process vendor code from V configuration line 2772 ** 2773 ** Parameters: 2774 ** vendor -- string representation of vendor. 2775 ** 2776 ** Returns: 2777 ** TRUE -- if ok. 2778 ** FALSE -- if vendor code could not be processed. 2779 ** 2780 ** Side Effects: 2781 ** It is reasonable to set mode flags here to tweak 2782 ** processing in other parts of the code if necessary. 2783 ** For example, if you are a vendor that uses $%y to 2784 ** indicate YP lookups, you could enable that here. 2785 */ 2786 2787 bool 2788 setvendor(vendor) 2789 char *vendor; 2790 { 2791 if (strcasecmp(vendor, "Berkeley") == 0) 2792 { 2793 VendorCode = VENDOR_BERKELEY; 2794 return TRUE; 2795 } 2796 2797 /* add vendor extensions here */ 2798 2799 #ifdef SUN_EXTENSIONS 2800 if (strcasecmp(vendor, "Sun") == 0) 2801 { 2802 VendorCode = VENDOR_SUN; 2803 return TRUE; 2804 } 2805 #endif 2806 2807 return FALSE; 2808 } 2809 /* 2810 ** VENDOR_PRE_DEFAULTS, VENDOR_POST_DEFAULTS -- set vendor-specific defaults 2811 ** 2812 ** Vendor_pre_defaults is called before reading the configuration 2813 ** file; vendor_post_defaults is called immediately after. 2814 ** 2815 ** Parameters: 2816 ** e -- the global environment to initialize. 2817 ** 2818 ** Returns: 2819 ** none. 2820 */ 2821 2822 void 2823 vendor_pre_defaults(e) 2824 ENVELOPE *e; 2825 { 2826 } 2827 2828 2829 void 2830 vendor_post_defaults(e) 2831 ENVELOPE *e; 2832 { 2833 } 2834 /* 2835 ** STRTOL -- convert string to long integer 2836 ** 2837 ** For systems that don't have it in the C library. 2838 ** 2839 ** This is taken verbatim from the 4.4-Lite C library. 2840 */ 2841 2842 #ifdef NEEDSTRTOL 2843 2844 #if defined(LIBC_SCCS) && !defined(lint) 2845 static char sccsid[] = "@(#)strtol.c 8.1 (Berkeley) 6/4/93"; 2846 #endif /* LIBC_SCCS and not lint */ 2847 2848 #include <limits.h> 2849 2850 /* 2851 * Convert a string to a long integer. 2852 * 2853 * Ignores `locale' stuff. Assumes that the upper and lower case 2854 * alphabets and digits are each contiguous. 2855 */ 2856 2857 long 2858 strtol(nptr, endptr, base) 2859 const char *nptr; 2860 char **endptr; 2861 register int base; 2862 { 2863 register const char *s = nptr; 2864 register unsigned long acc; 2865 register int c; 2866 register unsigned long cutoff; 2867 register int neg = 0, any, cutlim; 2868 2869 /* 2870 * Skip white space and pick up leading +/- sign if any. 2871 * If base is 0, allow 0x for hex and 0 for octal, else 2872 * assume decimal; if base is already 16, allow 0x. 2873 */ 2874 do { 2875 c = *s++; 2876 } while (isspace(c)); 2877 if (c == '-') { 2878 neg = 1; 2879 c = *s++; 2880 } else if (c == '+') 2881 c = *s++; 2882 if ((base == 0 || base == 16) && 2883 c == '0' && (*s == 'x' || *s == 'X')) { 2884 c = s[1]; 2885 s += 2; 2886 base = 16; 2887 } 2888 if (base == 0) 2889 base = c == '0' ? 8 : 10; 2890 2891 /* 2892 * Compute the cutoff value between legal numbers and illegal 2893 * numbers. That is the largest legal value, divided by the 2894 * base. An input number that is greater than this value, if 2895 * followed by a legal input character, is too big. One that 2896 * is equal to this value may be valid or not; the limit 2897 * between valid and invalid numbers is then based on the last 2898 * digit. For instance, if the range for longs is 2899 * [-2147483648..2147483647] and the input base is 10, 2900 * cutoff will be set to 214748364 and cutlim to either 2901 * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated 2902 * a value > 214748364, or equal but the next digit is > 7 (or 8), 2903 * the number is too big, and we will return a range error. 2904 * 2905 * Set any if any `digits' consumed; make it negative to indicate 2906 * overflow. 2907 */ 2908 cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX; 2909 cutlim = cutoff % (unsigned long)base; 2910 cutoff /= (unsigned long)base; 2911 for (acc = 0, any = 0;; c = *s++) { 2912 if (isdigit(c)) 2913 c -= '0'; 2914 else if (isalpha(c)) 2915 c -= isupper(c) ? 'A' - 10 : 'a' - 10; 2916 else 2917 break; 2918 if (c >= base) 2919 break; 2920 if (any < 0 || acc > cutoff || acc == cutoff && c > cutlim) 2921 any = -1; 2922 else { 2923 any = 1; 2924 acc *= base; 2925 acc += c; 2926 } 2927 } 2928 if (any < 0) { 2929 acc = neg ? LONG_MIN : LONG_MAX; 2930 errno = ERANGE; 2931 } else if (neg) 2932 acc = -acc; 2933 if (endptr != 0) 2934 *endptr = (char *)(any ? s - 1 : nptr); 2935 return (acc); 2936 } 2937 2938 #endif 2939 /* 2940 ** SM_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 2941 ** 2942 ** Some operating systems have wierd problems with the gethostbyXXX 2943 ** routines. For example, Solaris versions at least through 2.3 2944 ** don't properly deliver a canonical h_name field. This tries to 2945 ** work around these problems. 2946 */ 2947 2948 struct hostent * 2949 sm_gethostbyname(name) 2950 char *name; 2951 { 2952 #if defined(SOLARIS) && SOLARIS < 204 || defined(sony_news) && defined(__svr4) 2953 extern int h_errno; 2954 2955 # if SOLARIS == 203 2956 static struct hostent hp; 2957 static char buf[1000]; 2958 extern struct hostent *_switch_gethostbyname_r(); 2959 2960 return _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 2961 # else 2962 extern struct hostent *__switch_gethostbyname(); 2963 2964 return __switch_gethostbyname(name); 2965 # endif 2966 #else 2967 return gethostbyname(name); 2968 #endif 2969 } 2970 2971 struct hostent * 2972 sm_gethostbyaddr(addr, len, type) 2973 char *addr; 2974 int len; 2975 int type; 2976 { 2977 #if defined(SOLARIS) && SOLARIS < 204 2978 extern int h_errno; 2979 2980 # if SOLARIS == 203 2981 static struct hostent hp; 2982 static char buf[1000]; 2983 extern struct hostent *_switch_gethostbyaddr_r(); 2984 2985 return _switch_gethostbyaddr_r(addr, len, type, &hp, buf, sizeof(buf), &h_errno); 2986 # else 2987 extern struct hostent *__switch_gethostbyaddr(); 2988 2989 return __switch_gethostbyaddr(addr, len, type); 2990 # endif 2991 #else 2992 return gethostbyaddr(addr, len, type); 2993 #endif 2994 } 2995 /* 2996 ** SM_GETPW{NAM,UID} -- wrapper for getpwnam and getpwuid 2997 */ 2998 2999 struct passwd * 3000 sm_getpwnam(user) 3001 char *user; 3002 { 3003 return getpwnam(user); 3004 } 3005 3006 struct passwd * 3007 sm_getpwuid(uid) 3008 uid_t uid; 3009 { 3010 return getpwuid(uid); 3011 } 3012 /* 3013 ** LOAD_IF_NAMES -- load interface-specific names into $=w 3014 ** 3015 ** Parameters: 3016 ** none. 3017 ** 3018 ** Returns: 3019 ** none. 3020 ** 3021 ** Side Effects: 3022 ** Loads $=w with the names of all the interfaces. 3023 */ 3024 3025 #ifdef SIOCGIFCONF 3026 struct rtentry; 3027 struct mbuf; 3028 # include <arpa/inet.h> 3029 # include <sys/time.h> 3030 # include <net/if.h> 3031 #endif 3032 3033 void 3034 load_if_names() 3035 { 3036 #ifdef SIOCGIFCONF 3037 int s; 3038 int i; 3039 struct ifconf ifc; 3040 char interfacebuf[1024]; 3041 3042 s = socket(AF_INET, SOCK_DGRAM, 0); 3043 if (s == -1) 3044 return; 3045 3046 /* get the list of known IP address from the kernel */ 3047 ifc.ifc_buf = interfacebuf; 3048 ifc.ifc_len = sizeof interfacebuf; 3049 if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) 3050 { 3051 if (tTd(0, 4)) 3052 printf("SIOGIFCONF failed: %s\n", errstring(errno)); 3053 close(s); 3054 return; 3055 } 3056 close(s); 3057 3058 /* scan the list of IP address */ 3059 if (tTd(0, 4)) 3060 printf("scanning for interface specific names, ifc_len=%d\n", 3061 ifc.ifc_len); 3062 3063 for (i = 0; i < ifc.ifc_len; ) 3064 { 3065 struct ifreq *ifr = (struct ifreq *) &ifc.ifc_buf[i]; 3066 struct sockaddr *sa = &ifr->ifr_addr; 3067 struct in_addr ia; 3068 struct hostent *hp; 3069 char ip_addr[256]; 3070 extern char *inet_ntoa(); 3071 extern struct hostent *gethostbyaddr(); 3072 3073 #ifdef BSD4_4_SOCKADDR 3074 if (sa->sa_len > sizeof ifr->ifr_addr) 3075 i += sizeof ifr->ifr_name + sa->sa_len; 3076 else 3077 #endif 3078 i += sizeof *ifr; 3079 3080 if (tTd(0, 20)) 3081 printf("%s\n", anynet_ntoa((SOCKADDR *) sa)); 3082 3083 if (ifr->ifr_addr.sa_family != AF_INET) 3084 continue; 3085 3086 /* extract IP address from the list*/ 3087 ia = (((struct sockaddr_in *) sa)->sin_addr); 3088 3089 /* save IP address in text from */ 3090 (void) sprintf(ip_addr, "[%s]", 3091 inet_ntoa(((struct sockaddr_in *) sa)->sin_addr)); 3092 if (!wordinclass(ip_addr, 'w')) 3093 { 3094 setclass('w', ip_addr); 3095 if (tTd(0, 4)) 3096 printf("\ta.k.a.: %s\n", ip_addr); 3097 } 3098 3099 /* skip "loopback" interface "lo" */ 3100 if (strcmp("lo0", ifr->ifr_name) == 0) 3101 continue; 3102 3103 /* lookup name with IP address */ 3104 hp = sm_gethostbyaddr((char *) &ia, sizeof(ia), AF_INET); 3105 if (hp == NULL) 3106 { 3107 syslog(LOG_CRIT, "gethostbyaddr() failed for %s\n", 3108 inet_ntoa(ia)); 3109 continue; 3110 } 3111 3112 /* save its cname */ 3113 if (!wordinclass(hp->h_name, 'w')) 3114 { 3115 setclass('w', hp->h_name); 3116 if (tTd(0, 4)) 3117 printf("\ta.k.a.: %s\n", hp->h_name); 3118 } 3119 3120 /* save all it aliases name */ 3121 while (*hp->h_aliases) 3122 { 3123 if (!wordinclass(*hp->h_aliases, 'w')) 3124 { 3125 setclass('w', *hp->h_aliases); 3126 if (tTd(0, 4)) 3127 printf("\ta.k.a.: %s\n", *hp->h_aliases); 3128 } 3129 hp->h_aliases++; 3130 } 3131 } 3132 #endif 3133 } 3134 /* 3135 ** NI_PROPVAL -- netinfo property value lookup routine 3136 ** 3137 ** Parameters: 3138 ** keydir -- the Netinfo directory name in which to search 3139 ** for the key. 3140 ** keyprop -- the name of the property in which to find the 3141 ** property we are interested. Defaults to "name". 3142 ** keyval -- the value for which we are really searching. 3143 ** valprop -- the property name for the value in which we 3144 ** are interested. 3145 ** sepchar -- if non-nil, this can be multiple-valued, and 3146 ** we should return a string separated by this 3147 ** character. 3148 ** 3149 ** Returns: 3150 ** NULL -- if: 3151 ** 1. the directory is not found 3152 ** 2. the property name is not found 3153 ** 3. the property contains multiple values 3154 ** 4. some error occured 3155 ** else -- the location of the config file. 3156 ** 3157 ** Example: 3158 ** To search for an alias value, use: 3159 ** ni_propval("/aliases", "name", aliasname, "members", ',') 3160 ** 3161 ** Notes: 3162 ** Caller should free the return value of ni_proval 3163 */ 3164 3165 #ifdef NETINFO 3166 3167 # include <netinfo/ni.h> 3168 3169 # define LOCAL_NETINFO_DOMAIN "." 3170 # define PARENT_NETINFO_DOMAIN ".." 3171 # define MAX_NI_LEVELS 256 3172 3173 char * 3174 ni_propval(keydir, keyprop, keyval, valprop, sepchar) 3175 char *keydir; 3176 char *keyprop; 3177 char *keyval; 3178 char *valprop; 3179 char sepchar; 3180 { 3181 char *propval = NULL; 3182 int i; 3183 int j, alen; 3184 void *ni = NULL; 3185 void *lastni = NULL; 3186 ni_status nis; 3187 ni_id nid; 3188 ni_namelist ninl; 3189 register char *p; 3190 char keybuf[1024]; 3191 3192 /* 3193 ** Create the full key from the two parts. 3194 ** 3195 ** Note that directory can end with, e.g., "name=" to specify 3196 ** an alternate search property. 3197 */ 3198 3199 i = strlen(keydir) + strlen(keyval) + 2; 3200 if (keyprop != NULL) 3201 i += strlen(keyprop) + 1; 3202 if (i > sizeof keybuf) 3203 return NULL; 3204 strcpy(keybuf, keydir); 3205 strcat(keybuf, "/"); 3206 if (keyprop != NULL) 3207 { 3208 strcat(keybuf, keyprop); 3209 strcat(keybuf, "="); 3210 } 3211 strcat(keybuf, keyval); 3212 3213 /* 3214 ** If the passed directory and property name are found 3215 ** in one of netinfo domains we need to search (starting 3216 ** from the local domain moving all the way back to the 3217 ** root domain) set propval to the property's value 3218 ** and return it. 3219 */ 3220 3221 for (i = 0; i < MAX_NI_LEVELS; ++i) 3222 { 3223 if (i == 0) 3224 { 3225 nis = ni_open(NULL, LOCAL_NETINFO_DOMAIN, &ni); 3226 } 3227 else 3228 { 3229 if (lastni != NULL) 3230 ni_free(lastni); 3231 lastni = ni; 3232 nis = ni_open(lastni, PARENT_NETINFO_DOMAIN, &ni); 3233 } 3234 3235 /* 3236 ** Don't bother if we didn't get a handle on a 3237 ** proper domain. This is not necessarily an error. 3238 ** We would get a positive ni_status if, for instance 3239 ** we never found the directory or property and tried 3240 ** to open the parent of the root domain! 3241 */ 3242 3243 if (nis != 0) 3244 break; 3245 3246 /* 3247 ** Find the path to the server information. 3248 */ 3249 3250 if (ni_pathsearch(ni, &nid, keybuf) != 0) 3251 continue; 3252 3253 /* 3254 ** Find associated value information. 3255 */ 3256 3257 if (ni_lookupprop(ni, &nid, valprop, &ninl) != 0) 3258 continue; 3259 3260 /* 3261 ** See if we have an acceptable number of values. 3262 */ 3263 3264 if (ninl.ni_namelist_len <= 0) 3265 continue; 3266 3267 if (sepchar == '\0' && ninl.ni_namelist_len > 1) 3268 { 3269 ni_namelist_free(&ninl); 3270 continue; 3271 } 3272 3273 /* 3274 ** Calculate number of bytes needed and build result 3275 */ 3276 3277 alen = 1; 3278 for (j = 0; j < ninl.ni_namelist_len; j++) 3279 alen += strlen(ninl.ni_namelist_val[j]) + 1; 3280 propval = p = xalloc(alen); 3281 for (j = 0; j < ninl.ni_namelist_len; j++) 3282 { 3283 strcpy(p, ninl.ni_namelist_val[j]); 3284 p += strlen(p); 3285 *p++ = sepchar; 3286 } 3287 *--p = '\0'; 3288 3289 ni_namelist_free(&ninl); 3290 } 3291 3292 /* 3293 ** Clean up. 3294 */ 3295 3296 if (ni != NULL) 3297 ni_free(ni); 3298 if (lastni != NULL && ni != lastni) 3299 ni_free(lastni); 3300 3301 return propval; 3302 } 3303 3304 #endif /* NETINFO */ 3305 /* 3306 ** HARD_SYSLOG -- call syslog repeatedly until it works 3307 ** 3308 ** Needed on HP-UX, which apparently doesn't guarantee that 3309 ** syslog succeeds during interrupt handlers. 3310 */ 3311 3312 #ifdef __hpux 3313 3314 # define MAXSYSLOGTRIES 100 3315 # undef syslog 3316 3317 # ifdef __STDC__ 3318 hard_syslog(int pri, char *msg, ...) 3319 # else 3320 hard_syslog(pri, msg, va_alist) 3321 int pri; 3322 char *msg; 3323 va_dcl 3324 # endif 3325 { 3326 int i; 3327 char buf[SYSLOG_BUFSIZE * 2]; 3328 VA_LOCAL_DECL; 3329 3330 VA_START(msg); 3331 vsprintf(buf, msg, ap); 3332 VA_END; 3333 3334 for (i = MAXSYSLOGTRIES; --i >= 0 && syslog(pri, "%s", buf) < 0; ) 3335 continue; 3336 } 3337 3338 #endif 3339 /* 3340 ** LOCAL_HOSTNAME_LENGTH 3341 ** 3342 ** This is required to get sendmail to compile against BIND 4.9.x 3343 ** on Ultrix. 3344 */ 3345 3346 #if defined(ultrix) && NAMED_BIND 3347 3348 # include <resolv.h> 3349 # if __RES >= 19931104 3350 3351 int 3352 local_hostname_length(hostname) 3353 char *hostname; 3354 { 3355 int len_host, len_domain; 3356 3357 if (!*_res.defdname) 3358 res_init(); 3359 len_host = strlen(hostname); 3360 len_domain = strlen(_res.defdname); 3361 if (len_host > len_domain && 3362 (strcasecmp(hostname + len_host - len_domain,_res.defdname) == 0) && 3363 hostname[len_host - len_domain - 1] == '.') 3364 return len_host - len_domain - 1; 3365 else 3366 return 0; 3367 } 3368 3369 # endif 3370 #endif 3371 /* 3372 ** Compile-Time options 3373 */ 3374 3375 char *CompileOptions[] = 3376 { 3377 #if HESIOD 3378 "HESIOD", 3379 #endif 3380 #if LOG 3381 "LOG", 3382 #endif 3383 #if MATCHGECOS 3384 "MATCHGECOS", 3385 #endif 3386 #if NAMED_BIND 3387 "NAMED_BIND", 3388 #endif 3389 #if NDBM 3390 "NDBM", 3391 #endif 3392 #if NETINET 3393 "NETINET", 3394 #endif 3395 #if NETINFO 3396 "NETINFO", 3397 #endif 3398 #if NETISO 3399 "NETISO", 3400 #endif 3401 #if NETNS 3402 "NETNS", 3403 #endif 3404 #if NETUNIX 3405 "NETUNIX", 3406 #endif 3407 #if NETX25 3408 "NETX25", 3409 #endif 3410 #if NEWDB 3411 "NEWDB", 3412 #endif 3413 #if NIS 3414 "NIS", 3415 #endif 3416 #if NISPLUS 3417 "NISPLUS", 3418 #endif 3419 #if SCANF 3420 "SCANF", 3421 #endif 3422 #if SUID_ROOT_FILES_OK 3423 "SUID_ROOT_FILES_OK", 3424 #endif 3425 #if USERDB 3426 "USERDB", 3427 #endif 3428 #if XDEBUG 3429 "XDEBUG", 3430 #endif 3431 #if XLA 3432 "XLA", 3433 #endif 3434 NULL 3435 }; 3436