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 8.172 (Berkeley) 05/19/95"; 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 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_FLOAT) || (LA_TYPE == LA_SHORT) 1092 1093 #include <nlist.h> 1094 1095 #ifdef IRIX64 1096 # define nlist nlist64 1097 #endif 1098 1099 #ifndef LA_AVENRUN 1100 # ifdef SYSTEM5 1101 # define LA_AVENRUN "avenrun" 1102 # else 1103 # define LA_AVENRUN "_avenrun" 1104 # endif 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_WRITEUDOT 5 /* write u. area in kmem */ 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 # ifndef SPT_PADCHAR 1591 # define SPT_PADCHAR ' ' 1592 # endif 1593 1594 #endif /* SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN */ 1595 1596 #if SPT_TYPE != SPT_BUILTIN 1597 1598 /*VARARGS1*/ 1599 void 1600 # ifdef __STDC__ 1601 setproctitle(char *fmt, ...) 1602 # else 1603 setproctitle(fmt, va_alist) 1604 char *fmt; 1605 va_dcl 1606 # endif 1607 { 1608 # if SPT_TYPE != SPT_NONE 1609 register char *p; 1610 register int i; 1611 SETPROC_STATIC char buf[MAXLINE]; 1612 VA_LOCAL_DECL 1613 # if SPT_TYPE == SPT_PSTAT 1614 union pstun pst; 1615 # endif 1616 extern char **Argv; 1617 extern char *LastArgv; 1618 1619 p = buf; 1620 1621 /* print sendmail: heading for grep */ 1622 (void) strcpy(p, "sendmail: "); 1623 p += strlen(p); 1624 1625 /* print the argument string */ 1626 VA_START(fmt); 1627 (void) vsprintf(p, fmt, ap); 1628 VA_END; 1629 1630 i = strlen(buf); 1631 1632 # if SPT_TYPE == SPT_PSTAT 1633 pst.pst_command = buf; 1634 pstat(PSTAT_SETCMD, pst, i, 0, 0); 1635 # else 1636 # if SPT_TYPE == SPT_PSSTRINGS 1637 PS_STRINGS->ps_nargvstr = 1; 1638 PS_STRINGS->ps_argvstr = buf; 1639 # else 1640 if (i > LastArgv - Argv[0] - 2) 1641 { 1642 i = LastArgv - Argv[0] - 2; 1643 buf[i] = '\0'; 1644 } 1645 (void) strcpy(Argv[0], buf); 1646 p = &Argv[0][i]; 1647 while (p < LastArgv) 1648 *p++ = SPT_PADCHAR; 1649 Argv[1] = NULL; 1650 # endif /* SPT_TYPE == SPT_PSSTRINGS */ 1651 # endif /* SPT_TYPE == SPT_PSTAT */ 1652 # endif /* SPT_TYPE != SPT_NONE */ 1653 } 1654 1655 #endif /* SPT_TYPE != SPT_BUILTIN */ 1656 /* 1657 ** REAPCHILD -- pick up the body of my child, lest it become a zombie 1658 ** 1659 ** Parameters: 1660 ** sig -- the signal that got us here (unused). 1661 ** 1662 ** Returns: 1663 ** none. 1664 ** 1665 ** Side Effects: 1666 ** Picks up extant zombies. 1667 */ 1668 1669 void 1670 reapchild(sig) 1671 int sig; 1672 { 1673 int olderrno = errno; 1674 # ifdef HASWAITPID 1675 auto int status; 1676 int count; 1677 int pid; 1678 1679 count = 0; 1680 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) 1681 { 1682 if (count++ > 1000) 1683 { 1684 #ifdef LOG 1685 syslog(LOG_ALERT, "reapchild: waitpid loop: pid=%d, status=%x", 1686 pid, status); 1687 #endif 1688 break; 1689 } 1690 } 1691 # else 1692 # ifdef WNOHANG 1693 union wait status; 1694 1695 while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) 1696 continue; 1697 # else /* WNOHANG */ 1698 auto int status; 1699 1700 while (wait(&status) > 0) 1701 continue; 1702 # endif /* WNOHANG */ 1703 # endif 1704 # ifdef SYS5SIGNALS 1705 (void) setsignal(SIGCHLD, reapchild); 1706 # endif 1707 errno = olderrno; 1708 } 1709 /* 1710 ** UNSETENV -- remove a variable from the environment 1711 ** 1712 ** Not needed on newer systems. 1713 ** 1714 ** Parameters: 1715 ** name -- the string name of the environment variable to be 1716 ** deleted from the current environment. 1717 ** 1718 ** Returns: 1719 ** none. 1720 ** 1721 ** Globals: 1722 ** environ -- a pointer to the current environment. 1723 ** 1724 ** Side Effects: 1725 ** Modifies environ. 1726 */ 1727 1728 #ifndef HASUNSETENV 1729 1730 void 1731 unsetenv(name) 1732 char *name; 1733 { 1734 extern char **environ; 1735 register char **pp; 1736 int len = strlen(name); 1737 1738 for (pp = environ; *pp != NULL; pp++) 1739 { 1740 if (strncmp(name, *pp, len) == 0 && 1741 ((*pp)[len] == '=' || (*pp)[len] == '\0')) 1742 break; 1743 } 1744 1745 for (; *pp != NULL; pp++) 1746 *pp = pp[1]; 1747 } 1748 1749 #endif 1750 /* 1751 ** GETDTABLESIZE -- return number of file descriptors 1752 ** 1753 ** Only on non-BSD systems 1754 ** 1755 ** Parameters: 1756 ** none 1757 ** 1758 ** Returns: 1759 ** size of file descriptor table 1760 ** 1761 ** Side Effects: 1762 ** none 1763 */ 1764 1765 #ifdef SOLARIS 1766 # include <sys/resource.h> 1767 #endif 1768 1769 int 1770 getdtsize() 1771 { 1772 #ifdef RLIMIT_NOFILE 1773 struct rlimit rl; 1774 1775 if (getrlimit(RLIMIT_NOFILE, &rl) >= 0) 1776 return rl.rlim_cur; 1777 #endif 1778 1779 # ifdef HASGETDTABLESIZE 1780 return getdtablesize(); 1781 # else 1782 # ifdef _SC_OPEN_MAX 1783 return sysconf(_SC_OPEN_MAX); 1784 # else 1785 return NOFILE; 1786 # endif 1787 # endif 1788 } 1789 /* 1790 ** UNAME -- get the UUCP name of this system. 1791 */ 1792 1793 #ifndef HASUNAME 1794 1795 int 1796 uname(name) 1797 struct utsname *name; 1798 { 1799 FILE *file; 1800 char *n; 1801 1802 name->nodename[0] = '\0'; 1803 1804 /* try /etc/whoami -- one line with the node name */ 1805 if ((file = fopen("/etc/whoami", "r")) != NULL) 1806 { 1807 (void) fgets(name->nodename, NODE_LENGTH + 1, file); 1808 (void) fclose(file); 1809 n = strchr(name->nodename, '\n'); 1810 if (n != NULL) 1811 *n = '\0'; 1812 if (name->nodename[0] != '\0') 1813 return (0); 1814 } 1815 1816 /* try /usr/include/whoami.h -- has a #define somewhere */ 1817 if ((file = fopen("/usr/include/whoami.h", "r")) != NULL) 1818 { 1819 char buf[MAXLINE]; 1820 1821 while (fgets(buf, MAXLINE, file) != NULL) 1822 if (sscanf(buf, "#define sysname \"%*[^\"]\"", 1823 NODE_LENGTH, name->nodename) > 0) 1824 break; 1825 (void) fclose(file); 1826 if (name->nodename[0] != '\0') 1827 return (0); 1828 } 1829 1830 #ifdef TRUST_POPEN 1831 /* 1832 ** Popen is known to have security holes. 1833 */ 1834 1835 /* try uuname -l to return local name */ 1836 if ((file = popen("uuname -l", "r")) != NULL) 1837 { 1838 (void) fgets(name, NODE_LENGTH + 1, file); 1839 (void) pclose(file); 1840 n = strchr(name, '\n'); 1841 if (n != NULL) 1842 *n = '\0'; 1843 if (name->nodename[0] != '\0') 1844 return (0); 1845 } 1846 #endif 1847 1848 return (-1); 1849 } 1850 #endif /* HASUNAME */ 1851 /* 1852 ** INITGROUPS -- initialize groups 1853 ** 1854 ** Stub implementation for System V style systems 1855 */ 1856 1857 #ifndef HASINITGROUPS 1858 1859 initgroups(name, basegid) 1860 char *name; 1861 int basegid; 1862 { 1863 return 0; 1864 } 1865 1866 #endif 1867 /* 1868 ** SETSID -- set session id (for non-POSIX systems) 1869 */ 1870 1871 #ifndef HASSETSID 1872 1873 pid_t 1874 setsid __P ((void)) 1875 { 1876 #ifdef TIOCNOTTY 1877 int fd; 1878 1879 fd = open("/dev/tty", O_RDWR, 0); 1880 if (fd >= 0) 1881 { 1882 (void) ioctl(fd, (int) TIOCNOTTY, (char *) 0); 1883 (void) close(fd); 1884 } 1885 #endif /* TIOCNOTTY */ 1886 # ifdef SYS5SETPGRP 1887 return setpgrp(); 1888 # else 1889 return setpgid(0, getpid()); 1890 # endif 1891 } 1892 1893 #endif 1894 /* 1895 ** FSYNC -- dummy fsync 1896 */ 1897 1898 #ifdef NEEDFSYNC 1899 1900 fsync(fd) 1901 int fd; 1902 { 1903 # ifdef O_SYNC 1904 return fcntl(fd, F_SETFL, O_SYNC); 1905 # else 1906 /* nothing we can do */ 1907 return 0; 1908 # endif 1909 } 1910 1911 #endif 1912 /* 1913 ** DGUX_INET_ADDR -- inet_addr for DG/UX 1914 ** 1915 ** Data General DG/UX version of inet_addr returns a struct in_addr 1916 ** instead of a long. This patches things. Only needed on versions 1917 ** prior to 5.4.3. 1918 */ 1919 1920 #ifdef DGUX_5_4_2 1921 1922 #undef inet_addr 1923 1924 long 1925 dgux_inet_addr(host) 1926 char *host; 1927 { 1928 struct in_addr haddr; 1929 1930 haddr = inet_addr(host); 1931 return haddr.s_addr; 1932 } 1933 1934 #endif 1935 /* 1936 ** GETOPT -- for old systems or systems with bogus implementations 1937 */ 1938 1939 #ifdef NEEDGETOPT 1940 1941 /* 1942 * Copyright (c) 1985 Regents of the University of California. 1943 * All rights reserved. The Berkeley software License Agreement 1944 * specifies the terms and conditions for redistribution. 1945 */ 1946 1947 1948 /* 1949 ** this version hacked to add `atend' flag to allow state machine 1950 ** to reset if invoked by the program to scan args for a 2nd time 1951 */ 1952 1953 #if defined(LIBC_SCCS) && !defined(lint) 1954 static char sccsid[] = "@(#)getopt.c 4.3 (Berkeley) 3/9/86"; 1955 #endif /* LIBC_SCCS and not lint */ 1956 1957 #include <stdio.h> 1958 1959 /* 1960 * get option letter from argument vector 1961 */ 1962 #ifdef _CONVEX_SOURCE 1963 extern int optind, opterr, optopt; 1964 extern char *optarg; 1965 #else 1966 int opterr = 1; /* if error message should be printed */ 1967 int optind = 1; /* index into parent argv vector */ 1968 int optopt = 0; /* character checked for validity */ 1969 char *optarg = NULL; /* argument associated with option */ 1970 #endif 1971 1972 #define BADCH (int)'?' 1973 #define EMSG "" 1974 #define tell(s) if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \ 1975 fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);} 1976 1977 getopt(nargc,nargv,ostr) 1978 int nargc; 1979 char *const *nargv; 1980 const char *ostr; 1981 { 1982 static char *place = EMSG; /* option letter processing */ 1983 static char atend = 0; 1984 register char *oli; /* option letter list index */ 1985 1986 if (atend) { 1987 atend = 0; 1988 place = EMSG; 1989 } 1990 if(!*place) { /* update scanning pointer */ 1991 if (optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) { 1992 atend++; 1993 return(EOF); 1994 } 1995 if (*place == '-') { /* found "--" */ 1996 ++optind; 1997 atend++; 1998 return(EOF); 1999 } 2000 } /* option letter okay? */ 2001 if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr,optopt))) { 2002 if (!*place) ++optind; 2003 tell(": illegal option -- "); 2004 } 2005 if (*++oli != ':') { /* don't need argument */ 2006 optarg = NULL; 2007 if (!*place) ++optind; 2008 } 2009 else { /* need an argument */ 2010 if (*place) optarg = place; /* no white space */ 2011 else if (nargc <= ++optind) { /* no arg */ 2012 place = EMSG; 2013 tell(": option requires an argument -- "); 2014 } 2015 else optarg = nargv[optind]; /* white space */ 2016 place = EMSG; 2017 ++optind; 2018 } 2019 return(optopt); /* dump back option letter */ 2020 } 2021 2022 #endif 2023 /* 2024 ** VFPRINTF, VSPRINTF -- for old 4.3 BSD systems missing a real version 2025 */ 2026 2027 #ifdef NEEDVPRINTF 2028 2029 #define MAXARG 16 2030 2031 vfprintf(fp, fmt, ap) 2032 FILE * fp; 2033 char * fmt; 2034 char ** ap; 2035 { 2036 char * bp[MAXARG]; 2037 int i = 0; 2038 2039 while (*ap && i < MAXARG) 2040 bp[i++] = *ap++; 2041 fprintf(fp, fmt, bp[0], bp[1], bp[2], bp[3], 2042 bp[4], bp[5], bp[6], bp[7], 2043 bp[8], bp[9], bp[10], bp[11], 2044 bp[12], bp[13], bp[14], bp[15]); 2045 } 2046 2047 vsprintf(s, fmt, ap) 2048 char * s; 2049 char * fmt; 2050 char ** ap; 2051 { 2052 char * bp[MAXARG]; 2053 int i = 0; 2054 2055 while (*ap && i < MAXARG) 2056 bp[i++] = *ap++; 2057 sprintf(s, fmt, bp[0], bp[1], bp[2], bp[3], 2058 bp[4], bp[5], bp[6], bp[7], 2059 bp[8], bp[9], bp[10], bp[11], 2060 bp[12], bp[13], bp[14], bp[15]); 2061 } 2062 2063 #endif 2064 /* 2065 ** USERSHELLOK -- tell if a user's shell is ok for unrestricted use 2066 ** 2067 ** Parameters: 2068 ** shell -- the user's shell from /etc/passwd 2069 ** 2070 ** Returns: 2071 ** TRUE -- if it is ok to use this for unrestricted access. 2072 ** FALSE -- if the shell is restricted. 2073 */ 2074 2075 #if !HASGETUSERSHELL 2076 2077 # ifndef _PATH_SHELLS 2078 # define _PATH_SHELLS "/etc/shells" 2079 # endif 2080 2081 char *DefaultUserShells[] = 2082 { 2083 "/bin/sh", /* standard shell */ 2084 "/usr/bin/sh", 2085 "/bin/csh", /* C shell */ 2086 "/usr/bin/csh", 2087 #ifdef __hpux 2088 # ifdef V4FS 2089 "/usr/bin/rsh", /* restricted Bourne shell */ 2090 "/usr/bin/ksh", /* Korn shell */ 2091 "/usr/bin/rksh", /* restricted Korn shell */ 2092 "/usr/bin/pam", 2093 "/usr/bin/keysh", /* key shell (extended Korn shell) */ 2094 "/usr/bin/posix/sh", 2095 # else 2096 "/bin/rsh", /* restricted Bourne shell */ 2097 "/bin/ksh", /* Korn shell */ 2098 "/bin/rksh", /* restricted Korn shell */ 2099 "/bin/pam", 2100 "/usr/bin/keysh", /* key shell (extended Korn shell) */ 2101 "/bin/posix/sh", 2102 # endif 2103 #endif 2104 #ifdef _AIX3 2105 "/bin/ksh", /* Korn shell */ 2106 "/usr/bin/ksh", 2107 "/bin/tsh", /* trusted shell */ 2108 "/usr/bin/tsh", 2109 "/bin/bsh", /* Bourne shell */ 2110 "/usr/bin/bsh", 2111 #endif 2112 NULL 2113 }; 2114 2115 #endif 2116 2117 #define WILDCARD_SHELL "/SENDMAIL/ANY/SHELL/" 2118 2119 bool 2120 usershellok(shell) 2121 char *shell; 2122 { 2123 #if HASGETUSERSHELL 2124 register char *p; 2125 extern char *getusershell(); 2126 2127 if (shell == NULL || shell[0] == '\0' || ConfigLevel <= 1) 2128 return TRUE; 2129 2130 setusershell(); 2131 while ((p = getusershell()) != NULL) 2132 if (strcmp(p, shell) == 0 || strcmp(p, WILDCARD_SHELL) == 0) 2133 break; 2134 endusershell(); 2135 return p != NULL; 2136 #else 2137 register FILE *shellf; 2138 char buf[MAXLINE]; 2139 2140 if (shell == NULL || shell[0] == '\0') 2141 return TRUE; 2142 2143 shellf = fopen(_PATH_SHELLS, "r"); 2144 if (shellf == NULL) 2145 { 2146 /* no /etc/shells; see if it is one of the std shells */ 2147 char **d; 2148 2149 for (d = DefaultUserShells; *d != NULL; d++) 2150 { 2151 if (strcmp(shell, *d) == 0) 2152 return TRUE; 2153 } 2154 return FALSE; 2155 } 2156 2157 while (fgets(buf, sizeof buf, shellf) != NULL) 2158 { 2159 register char *p, *q; 2160 2161 p = buf; 2162 while (*p != '\0' && *p != '#' && *p != '/') 2163 p++; 2164 if (*p == '#' || *p == '\0') 2165 continue; 2166 q = p; 2167 while (*p != '\0' && *p != '#' && !isspace(*p)) 2168 p++; 2169 *p = '\0'; 2170 if (strcmp(shell, q) == 0 || strcmp(WILDCARD_SHELL, q) == 0) 2171 { 2172 fclose(shellf); 2173 return TRUE; 2174 } 2175 } 2176 fclose(shellf); 2177 return FALSE; 2178 #endif 2179 } 2180 /* 2181 ** FREESPACE -- see how much free space is on the queue filesystem 2182 ** 2183 ** Only implemented if you have statfs. 2184 ** 2185 ** Parameters: 2186 ** dir -- the directory in question. 2187 ** bsize -- a variable into which the filesystem 2188 ** block size is stored. 2189 ** 2190 ** Returns: 2191 ** The number of bytes free on the queue filesystem. 2192 ** -1 if the statfs call fails. 2193 ** 2194 ** Side effects: 2195 ** Puts the filesystem block size into bsize. 2196 */ 2197 2198 /* statfs types */ 2199 #define SFS_NONE 0 /* no statfs implementation */ 2200 #define SFS_USTAT 1 /* use ustat */ 2201 #define SFS_4ARGS 2 /* use four-argument statfs call */ 2202 #define SFS_VFS 3 /* use <sys/vfs.h> implementation */ 2203 #define SFS_MOUNT 4 /* use <sys/mount.h> implementation */ 2204 #define SFS_STATFS 5 /* use <sys/statfs.h> implementation */ 2205 #define SFS_STATVFS 6 /* use <sys/statvfs.h> implementation */ 2206 2207 #ifndef SFS_TYPE 2208 # define SFS_TYPE SFS_NONE 2209 #endif 2210 2211 #if SFS_TYPE == SFS_USTAT 2212 # include <ustat.h> 2213 #endif 2214 #if SFS_TYPE == SFS_4ARGS || SFS_TYPE == SFS_STATFS 2215 # include <sys/statfs.h> 2216 #endif 2217 #if SFS_TYPE == SFS_VFS 2218 # include <sys/vfs.h> 2219 #endif 2220 #if SFS_TYPE == SFS_MOUNT 2221 # include <sys/mount.h> 2222 #endif 2223 #if SFS_TYPE == SFS_STATVFS 2224 # include <sys/statvfs.h> 2225 #endif 2226 2227 long 2228 freespace(dir, bsize) 2229 char *dir; 2230 long *bsize; 2231 { 2232 #if SFS_TYPE != SFS_NONE 2233 # if SFS_TYPE == SFS_USTAT 2234 struct ustat fs; 2235 struct stat statbuf; 2236 # define FSBLOCKSIZE DEV_BSIZE 2237 # define SFS_BAVAIL f_tfree 2238 # else 2239 # if defined(ultrix) 2240 struct fs_data fs; 2241 # define SFS_BAVAIL fd_bfreen 2242 # define FSBLOCKSIZE 1024L 2243 # else 2244 # if SFS_TYPE == SFS_STATVFS 2245 struct statvfs fs; 2246 # define FSBLOCKSIZE fs.f_frsize 2247 # else 2248 struct statfs fs; 2249 # define FSBLOCKSIZE fs.f_bsize 2250 # endif 2251 # endif 2252 # endif 2253 # ifndef SFS_BAVAIL 2254 # define SFS_BAVAIL f_bavail 2255 # endif 2256 2257 # if SFS_TYPE == SFS_USTAT 2258 if (stat(dir, &statbuf) == 0 && ustat(statbuf.st_dev, &fs) == 0) 2259 # else 2260 # if SFS_TYPE == SFS_4ARGS 2261 if (statfs(dir, &fs, sizeof fs, 0) == 0) 2262 # else 2263 # if SFS_TYPE == SFS_STATVFS 2264 if (statvfs(dir, &fs) == 0) 2265 # else 2266 # if defined(ultrix) 2267 if (statfs(dir, &fs) > 0) 2268 # else 2269 if (statfs(dir, &fs) == 0) 2270 # endif 2271 # endif 2272 # endif 2273 # endif 2274 { 2275 if (bsize != NULL) 2276 *bsize = FSBLOCKSIZE; 2277 return (fs.SFS_BAVAIL); 2278 } 2279 #endif 2280 return (-1); 2281 } 2282 /* 2283 ** ENOUGHSPACE -- check to see if there is enough free space on the queue fs 2284 ** 2285 ** Only implemented if you have statfs. 2286 ** 2287 ** Parameters: 2288 ** msize -- the size to check against. If zero, we don't yet 2289 ** know how big the message will be, so just check for 2290 ** a "reasonable" amount. 2291 ** 2292 ** Returns: 2293 ** TRUE if there is enough space. 2294 ** FALSE otherwise. 2295 */ 2296 2297 bool 2298 enoughspace(msize) 2299 long msize; 2300 { 2301 long bfree, bsize; 2302 2303 if (MinBlocksFree <= 0 && msize <= 0) 2304 { 2305 if (tTd(4, 80)) 2306 printf("enoughspace: no threshold\n"); 2307 return TRUE; 2308 } 2309 2310 if ((bfree = freespace(QueueDir, &bsize)) >= 0) 2311 { 2312 if (tTd(4, 80)) 2313 printf("enoughspace: bavail=%ld, need=%ld\n", 2314 bfree, msize); 2315 2316 /* convert msize to block count */ 2317 msize = msize / bsize + 1; 2318 if (MinBlocksFree >= 0) 2319 msize += MinBlocksFree; 2320 2321 if (bfree < msize) 2322 { 2323 #ifdef LOG 2324 if (LogLevel > 0) 2325 syslog(LOG_ALERT, 2326 "%s: low on space (have %ld, %s needs %ld in %s)", 2327 CurEnv->e_id == NULL ? "[NOQUEUE]" : CurEnv->e_id, 2328 bfree, 2329 CurHostName == NULL ? "SMTP-DAEMON" : CurHostName, 2330 msize, QueueDir); 2331 #endif 2332 return FALSE; 2333 } 2334 } 2335 else if (tTd(4, 80)) 2336 printf("enoughspace failure: min=%ld, need=%ld: %s\n", 2337 MinBlocksFree, msize, errstring(errno)); 2338 return TRUE; 2339 } 2340 /* 2341 ** TRANSIENTERROR -- tell if an error code indicates a transient failure 2342 ** 2343 ** This looks at an errno value and tells if this is likely to 2344 ** go away if retried later. 2345 ** 2346 ** Parameters: 2347 ** err -- the errno code to classify. 2348 ** 2349 ** Returns: 2350 ** TRUE if this is probably transient. 2351 ** FALSE otherwise. 2352 */ 2353 2354 bool 2355 transienterror(err) 2356 int err; 2357 { 2358 switch (err) 2359 { 2360 case EIO: /* I/O error */ 2361 case ENXIO: /* Device not configured */ 2362 case EAGAIN: /* Resource temporarily unavailable */ 2363 case ENOMEM: /* Cannot allocate memory */ 2364 case ENODEV: /* Operation not supported by device */ 2365 case ENFILE: /* Too many open files in system */ 2366 case EMFILE: /* Too many open files */ 2367 case ENOSPC: /* No space left on device */ 2368 #ifdef ETIMEDOUT 2369 case ETIMEDOUT: /* Connection timed out */ 2370 #endif 2371 #ifdef ESTALE 2372 case ESTALE: /* Stale NFS file handle */ 2373 #endif 2374 #ifdef ENETDOWN 2375 case ENETDOWN: /* Network is down */ 2376 #endif 2377 #ifdef ENETUNREACH 2378 case ENETUNREACH: /* Network is unreachable */ 2379 #endif 2380 #ifdef ENETRESET 2381 case ENETRESET: /* Network dropped connection on reset */ 2382 #endif 2383 #ifdef ECONNABORTED 2384 case ECONNABORTED: /* Software caused connection abort */ 2385 #endif 2386 #ifdef ECONNRESET 2387 case ECONNRESET: /* Connection reset by peer */ 2388 #endif 2389 #ifdef ENOBUFS 2390 case ENOBUFS: /* No buffer space available */ 2391 #endif 2392 #ifdef ESHUTDOWN 2393 case ESHUTDOWN: /* Can't send after socket shutdown */ 2394 #endif 2395 #ifdef ECONNREFUSED 2396 case ECONNREFUSED: /* Connection refused */ 2397 #endif 2398 #ifdef EHOSTDOWN 2399 case EHOSTDOWN: /* Host is down */ 2400 #endif 2401 #ifdef EHOSTUNREACH 2402 case EHOSTUNREACH: /* No route to host */ 2403 #endif 2404 #ifdef EDQUOT 2405 case EDQUOT: /* Disc quota exceeded */ 2406 #endif 2407 #ifdef EPROCLIM 2408 case EPROCLIM: /* Too many processes */ 2409 #endif 2410 #ifdef EUSERS 2411 case EUSERS: /* Too many users */ 2412 #endif 2413 #ifdef EDEADLK 2414 case EDEADLK: /* Resource deadlock avoided */ 2415 #endif 2416 #ifdef EISCONN 2417 case EISCONN: /* Socket already connected */ 2418 #endif 2419 #ifdef EINPROGRESS 2420 case EINPROGRESS: /* Operation now in progress */ 2421 #endif 2422 #ifdef EALREADY 2423 case EALREADY: /* Operation already in progress */ 2424 #endif 2425 #ifdef EADDRINUSE 2426 case EADDRINUSE: /* Address already in use */ 2427 #endif 2428 #ifdef EADDRNOTAVAIL 2429 case EADDRNOTAVAIL: /* Can't assign requested address */ 2430 #endif 2431 #ifdef ETXTBSY 2432 case ETXTBSY: /* (Apollo) file locked */ 2433 #endif 2434 #if defined(ENOSR) && (!defined(ENOBUFS) || (ENOBUFS != ENOSR)) 2435 case ENOSR: /* Out of streams resources */ 2436 #endif 2437 return TRUE; 2438 } 2439 2440 /* nope, must be permanent */ 2441 return FALSE; 2442 } 2443 /* 2444 ** LOCKFILE -- lock a file using flock or (shudder) fcntl locking 2445 ** 2446 ** Parameters: 2447 ** fd -- the file descriptor of the file. 2448 ** filename -- the file name (for error messages). 2449 ** ext -- the filename extension. 2450 ** type -- type of the lock. Bits can be: 2451 ** LOCK_EX -- exclusive lock. 2452 ** LOCK_NB -- non-blocking. 2453 ** 2454 ** Returns: 2455 ** TRUE if the lock was acquired. 2456 ** FALSE otherwise. 2457 */ 2458 2459 bool 2460 lockfile(fd, filename, ext, type) 2461 int fd; 2462 char *filename; 2463 char *ext; 2464 int type; 2465 { 2466 # if !HASFLOCK 2467 int action; 2468 struct flock lfd; 2469 2470 if (ext == NULL) 2471 ext = ""; 2472 2473 bzero(&lfd, sizeof lfd); 2474 if (bitset(LOCK_UN, type)) 2475 lfd.l_type = F_UNLCK; 2476 else if (bitset(LOCK_EX, type)) 2477 lfd.l_type = F_WRLCK; 2478 else 2479 lfd.l_type = F_RDLCK; 2480 2481 if (bitset(LOCK_NB, type)) 2482 action = F_SETLK; 2483 else 2484 action = F_SETLKW; 2485 2486 if (tTd(55, 60)) 2487 printf("lockfile(%s%s, action=%d, type=%d): ", 2488 filename, ext, action, lfd.l_type); 2489 2490 if (fcntl(fd, action, &lfd) >= 0) 2491 { 2492 if (tTd(55, 60)) 2493 printf("SUCCESS\n"); 2494 return TRUE; 2495 } 2496 2497 if (tTd(55, 60)) 2498 printf("(%s) ", errstring(errno)); 2499 2500 /* 2501 ** On SunOS, if you are testing using -oQ/tmp/mqueue or 2502 ** -oA/tmp/aliases or anything like that, and /tmp is mounted 2503 ** as type "tmp" (that is, served from swap space), the 2504 ** previous fcntl will fail with "Invalid argument" errors. 2505 ** Since this is fairly common during testing, we will assume 2506 ** that this indicates that the lock is successfully grabbed. 2507 */ 2508 2509 if (errno == EINVAL) 2510 { 2511 if (tTd(55, 60)) 2512 printf("SUCCESS\n"); 2513 return TRUE; 2514 } 2515 2516 if (!bitset(LOCK_NB, type) || (errno != EACCES && errno != EAGAIN)) 2517 { 2518 int omode = -1; 2519 # ifdef F_GETFL 2520 int oerrno = errno; 2521 2522 (void) fcntl(fd, F_GETFL, &omode); 2523 errno = oerrno; 2524 # endif 2525 syserr("cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 2526 filename, ext, fd, type, omode, geteuid()); 2527 } 2528 # else 2529 if (ext == NULL) 2530 ext = ""; 2531 2532 if (tTd(55, 60)) 2533 printf("lockfile(%s%s, type=%o): ", filename, ext, type); 2534 2535 if (flock(fd, type) >= 0) 2536 { 2537 if (tTd(55, 60)) 2538 printf("SUCCESS\n"); 2539 return TRUE; 2540 } 2541 2542 if (tTd(55, 60)) 2543 printf("(%s) ", errstring(errno)); 2544 2545 if (!bitset(LOCK_NB, type) || errno != EWOULDBLOCK) 2546 { 2547 int omode = -1; 2548 # ifdef F_GETFL 2549 int oerrno = errno; 2550 2551 (void) fcntl(fd, F_GETFL, &omode); 2552 errno = oerrno; 2553 # endif 2554 syserr("cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 2555 filename, ext, fd, type, omode, geteuid()); 2556 } 2557 # endif 2558 if (tTd(55, 60)) 2559 printf("FAIL\n"); 2560 return FALSE; 2561 } 2562 /* 2563 ** CHOWNSAFE -- tell if chown is "safe" (executable only by root) 2564 ** 2565 ** Parameters: 2566 ** fd -- the file descriptor to check. 2567 ** 2568 ** Returns: 2569 ** TRUE -- if only root can chown the file to an arbitrary 2570 ** user. 2571 ** FALSE -- if an arbitrary user can give away a file. 2572 */ 2573 2574 bool 2575 chownsafe(fd) 2576 int fd; 2577 { 2578 #ifdef __hpux 2579 char *s; 2580 int tfd; 2581 uid_t o_uid, o_euid; 2582 gid_t o_gid, o_egid; 2583 bool rval; 2584 struct stat stbuf; 2585 2586 o_uid = getuid(); 2587 o_euid = geteuid(); 2588 o_gid = getgid(); 2589 o_egid = getegid(); 2590 fstat(fd, &stbuf); 2591 setresuid(stbuf.st_uid, stbuf.st_uid, -1); 2592 setresgid(stbuf.st_gid, stbuf.st_gid, -1); 2593 s = tmpnam(NULL); 2594 tfd = open(s, O_RDONLY|O_CREAT, 0600); 2595 rval = fchown(tfd, DefUid, DefGid) != 0; 2596 close(tfd); 2597 unlink(s); 2598 setreuid(o_uid, o_euid); 2599 setresgid(o_gid, o_egid, -1); 2600 return rval; 2601 #else 2602 # ifdef _POSIX_CHOWN_RESTRICTED 2603 # if _POSIX_CHOWN_RESTRICTED == -1 2604 return FALSE; 2605 # else 2606 return TRUE; 2607 # endif 2608 # else 2609 # ifdef _PC_CHOWN_RESTRICTED 2610 int rval; 2611 2612 /* 2613 ** Some systems (e.g., SunOS) seem to have the call and the 2614 ** #define _PC_CHOWN_RESTRICTED, but don't actually implement 2615 ** the call. This heuristic checks for that. 2616 */ 2617 2618 errno = 0; 2619 rval = fpathconf(fd, _PC_CHOWN_RESTRICTED); 2620 if (errno == 0) 2621 return rval > 0; 2622 # endif 2623 # ifdef BSD 2624 return TRUE; 2625 # else 2626 return FALSE; 2627 # endif 2628 # endif 2629 #endif 2630 } 2631 /* 2632 ** RESETLIMITS -- reset system controlled resource limits 2633 ** 2634 ** This is to avoid denial-of-service attacks 2635 ** 2636 ** Parameters: 2637 ** none 2638 ** 2639 ** Returns: 2640 ** none 2641 */ 2642 2643 #if HASSETRLIMIT 2644 # include <sys/resource.h> 2645 #endif 2646 2647 void 2648 resetlimits() 2649 { 2650 #if HASSETRLIMIT 2651 struct rlimit lim; 2652 2653 lim.rlim_cur = lim.rlim_max = RLIM_INFINITY; 2654 (void) setrlimit(RLIMIT_CPU, &lim); 2655 (void) setrlimit(RLIMIT_FSIZE, &lim); 2656 #else 2657 # if HASULIMIT 2658 (void) ulimit(2, 0x3fffff); 2659 # endif 2660 #endif 2661 } 2662 /* 2663 ** GETCFNAME -- return the name of the .cf file. 2664 ** 2665 ** Some systems (e.g., NeXT) determine this dynamically. 2666 */ 2667 2668 char * 2669 getcfname() 2670 { 2671 int i; 2672 static char cbuf[200]; 2673 2674 if (ConfFile != NULL) 2675 return ConfFile; 2676 #ifdef NETINFO 2677 { 2678 extern char *ni_propval(); 2679 char *cflocation; 2680 2681 cflocation = ni_propval("/locations", NULL, "sendmail", 2682 "sendmail.cf", '\0'); 2683 if (cflocation != NULL) 2684 return cflocation; 2685 } 2686 #endif 2687 2688 #ifdef TRY_VERSIONED_CF_NAME 2689 /* 2690 ** Try sendmail.8.6.12.cf, then sendmail.8.6.cf, then 2691 ** sendmail.8.cf, and finally sendmail.cf. 2692 ** 2693 ** I suppose it should really try a search path here -- 2694 ** e.g., /etc/sendmail.cf, /etc/mail/sendmail.cf, 2695 ** /usr/lib/sendmail.cf, and so forth. 2696 */ 2697 2698 strcpy(cbuf, _PATH_SENDMAILCF); 2699 i = strlen(cbuf); 2700 if (strcmp(&cbuf[i - 3], ".cf") == 0) 2701 { 2702 char *p; 2703 extern char Version[]; 2704 2705 strcpy(&cbuf[i - 2], Version); 2706 p = strchr(&cbuf[i - 2], '/'); 2707 if (p != NULL) 2708 *p = '\0'; 2709 p = &cbuf[strlen(cbuf)]; 2710 do 2711 { 2712 int fd; 2713 2714 strcpy(p, ".cf"); 2715 if ((fd = open(cbuf, O_RDONLY, 0)) >= 0) 2716 { 2717 close(fd); 2718 return cbuf; 2719 } 2720 *p = '\0'; 2721 } while ((p = strrchr(&cbuf[i - 2], '.')) != NULL); 2722 } 2723 #endif 2724 return _PATH_SENDMAILCF; 2725 } 2726 /* 2727 ** SETVENDOR -- process vendor code from V configuration line 2728 ** 2729 ** Parameters: 2730 ** vendor -- string representation of vendor. 2731 ** 2732 ** Returns: 2733 ** TRUE -- if ok. 2734 ** FALSE -- if vendor code could not be processed. 2735 ** 2736 ** Side Effects: 2737 ** It is reasonable to set mode flags here to tweak 2738 ** processing in other parts of the code if necessary. 2739 ** For example, if you are a vendor that uses $%y to 2740 ** indicate YP lookups, you could enable that here. 2741 */ 2742 2743 bool 2744 setvendor(vendor) 2745 char *vendor; 2746 { 2747 if (strcasecmp(vendor, "Berkeley") == 0) 2748 { 2749 VendorCode = VENDOR_BERKELEY; 2750 return TRUE; 2751 } 2752 2753 /* add vendor extensions here */ 2754 2755 #ifdef SUN_EXTENSIONS 2756 if (strcasecmp(vendor, "Sun") == 0) 2757 { 2758 VendorCode = VENDOR_SUN; 2759 return TRUE; 2760 } 2761 #endif 2762 2763 return FALSE; 2764 } 2765 /* 2766 ** VENDOR_PRE_DEFAULTS, VENDOR_POST_DEFAULTS -- set vendor-specific defaults 2767 ** 2768 ** Vendor_pre_defaults is called before reading the configuration 2769 ** file; vendor_post_defaults is called immediately after. 2770 ** 2771 ** Parameters: 2772 ** e -- the global environment to initialize. 2773 ** 2774 ** Returns: 2775 ** none. 2776 */ 2777 2778 void 2779 vendor_pre_defaults(e) 2780 ENVELOPE *e; 2781 { 2782 } 2783 2784 2785 void 2786 vendor_post_defaults(e) 2787 ENVELOPE *e; 2788 { 2789 } 2790 /* 2791 ** STRTOL -- convert string to long integer 2792 ** 2793 ** For systems that don't have it in the C library. 2794 ** 2795 ** This is taken verbatim from the 4.4-Lite C library. 2796 */ 2797 2798 #ifdef NEEDSTRTOL 2799 2800 #if defined(LIBC_SCCS) && !defined(lint) 2801 static char sccsid[] = "@(#)strtol.c 8.1 (Berkeley) 6/4/93"; 2802 #endif /* LIBC_SCCS and not lint */ 2803 2804 #include <limits.h> 2805 2806 /* 2807 * Convert a string to a long integer. 2808 * 2809 * Ignores `locale' stuff. Assumes that the upper and lower case 2810 * alphabets and digits are each contiguous. 2811 */ 2812 2813 long 2814 strtol(nptr, endptr, base) 2815 const char *nptr; 2816 char **endptr; 2817 register int base; 2818 { 2819 register const char *s = nptr; 2820 register unsigned long acc; 2821 register int c; 2822 register unsigned long cutoff; 2823 register int neg = 0, any, cutlim; 2824 2825 /* 2826 * Skip white space and pick up leading +/- sign if any. 2827 * If base is 0, allow 0x for hex and 0 for octal, else 2828 * assume decimal; if base is already 16, allow 0x. 2829 */ 2830 do { 2831 c = *s++; 2832 } while (isspace(c)); 2833 if (c == '-') { 2834 neg = 1; 2835 c = *s++; 2836 } else if (c == '+') 2837 c = *s++; 2838 if ((base == 0 || base == 16) && 2839 c == '0' && (*s == 'x' || *s == 'X')) { 2840 c = s[1]; 2841 s += 2; 2842 base = 16; 2843 } 2844 if (base == 0) 2845 base = c == '0' ? 8 : 10; 2846 2847 /* 2848 * Compute the cutoff value between legal numbers and illegal 2849 * numbers. That is the largest legal value, divided by the 2850 * base. An input number that is greater than this value, if 2851 * followed by a legal input character, is too big. One that 2852 * is equal to this value may be valid or not; the limit 2853 * between valid and invalid numbers is then based on the last 2854 * digit. For instance, if the range for longs is 2855 * [-2147483648..2147483647] and the input base is 10, 2856 * cutoff will be set to 214748364 and cutlim to either 2857 * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated 2858 * a value > 214748364, or equal but the next digit is > 7 (or 8), 2859 * the number is too big, and we will return a range error. 2860 * 2861 * Set any if any `digits' consumed; make it negative to indicate 2862 * overflow. 2863 */ 2864 cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX; 2865 cutlim = cutoff % (unsigned long)base; 2866 cutoff /= (unsigned long)base; 2867 for (acc = 0, any = 0;; c = *s++) { 2868 if (isdigit(c)) 2869 c -= '0'; 2870 else if (isalpha(c)) 2871 c -= isupper(c) ? 'A' - 10 : 'a' - 10; 2872 else 2873 break; 2874 if (c >= base) 2875 break; 2876 if (any < 0 || acc > cutoff || acc == cutoff && c > cutlim) 2877 any = -1; 2878 else { 2879 any = 1; 2880 acc *= base; 2881 acc += c; 2882 } 2883 } 2884 if (any < 0) { 2885 acc = neg ? LONG_MIN : LONG_MAX; 2886 errno = ERANGE; 2887 } else if (neg) 2888 acc = -acc; 2889 if (endptr != 0) 2890 *endptr = (char *)(any ? s - 1 : nptr); 2891 return (acc); 2892 } 2893 2894 #endif 2895 /* 2896 ** SM_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 2897 ** 2898 ** Some operating systems have wierd problems with the gethostbyXXX 2899 ** routines. For example, Solaris versions at least through 2.3 2900 ** don't properly deliver a canonical h_name field. This tries to 2901 ** work around these problems. 2902 */ 2903 2904 struct hostent * 2905 sm_gethostbyname(name) 2906 char *name; 2907 { 2908 #if defined(SOLARIS) && SOLARIS < 204 2909 extern int h_errno; 2910 2911 # if SOLARIS == 203 2912 static struct hostent hp; 2913 static char buf[1000]; 2914 extern struct hostent *_switch_gethostbyname_r(); 2915 2916 return _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 2917 # else 2918 extern struct hostent *__switch_gethostbyname(); 2919 2920 return __switch_gethostbyname(name); 2921 # endif 2922 #else 2923 return gethostbyname(name); 2924 #endif 2925 } 2926 2927 struct hostent * 2928 sm_gethostbyaddr(addr, len, type) 2929 char *addr; 2930 int len; 2931 int type; 2932 { 2933 #if defined(SOLARIS) && SOLARIS < 204 2934 extern int h_errno; 2935 2936 # if SOLARIS == 203 2937 static struct hostent hp; 2938 static char buf[1000]; 2939 extern struct hostent *_switch_gethostbyaddr_r(); 2940 2941 return _switch_gethostbyaddr_r(addr, len, type, &hp, buf, sizeof(buf), &h_errno); 2942 # else 2943 extern struct hostent *__switch_gethostbyaddr(); 2944 2945 return __switch_gethostbyaddr(addr, len, type); 2946 # endif 2947 #else 2948 return gethostbyaddr(addr, len, type); 2949 #endif 2950 } 2951 /* 2952 ** SM_GETPW{NAM,UID} -- wrapper for getpwnam and getpwuid 2953 */ 2954 2955 struct passwd * 2956 sm_getpwnam(user) 2957 char *user; 2958 { 2959 return getpwnam(user); 2960 } 2961 2962 struct passwd * 2963 sm_getpwuid(uid) 2964 uid_t uid; 2965 { 2966 return getpwuid(uid); 2967 } 2968 /* 2969 ** LOAD_IF_NAMES -- load interface-specific names into $=w 2970 ** 2971 ** Parameters: 2972 ** none. 2973 ** 2974 ** Returns: 2975 ** none. 2976 ** 2977 ** Side Effects: 2978 ** Loads $=w with the names of all the interfaces. 2979 */ 2980 2981 #ifdef SIOCGIFCONF 2982 struct rtentry; 2983 struct mbuf; 2984 # include <arpa/inet.h> 2985 # include <sys/time.h> 2986 # include <net/if.h> 2987 #endif 2988 2989 void 2990 load_if_names() 2991 { 2992 #ifdef SIOCGIFCONF 2993 int s; 2994 int i; 2995 struct ifconf ifc; 2996 char interfacebuf[1024]; 2997 2998 s = socket(AF_INET, SOCK_DGRAM, 0); 2999 if (s == -1) 3000 return; 3001 3002 /* get the list of known IP address from the kernel */ 3003 ifc.ifc_buf = interfacebuf; 3004 ifc.ifc_len = sizeof interfacebuf; 3005 if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) 3006 { 3007 if (tTd(0, 4)) 3008 printf("SIOGIFCONF failed: %s\n", errstring(errno)); 3009 close(s); 3010 return; 3011 } 3012 close(s); 3013 3014 /* scan the list of IP address */ 3015 if (tTd(0, 4)) 3016 printf("scanning for interface specific names, ifc_len=%d\n", 3017 ifc.ifc_len); 3018 3019 for (i = 0; i < ifc.ifc_len; ) 3020 { 3021 struct ifreq *ifr = (struct ifreq *) &ifc.ifc_buf[i]; 3022 struct sockaddr *sa = &ifr->ifr_addr; 3023 struct in_addr ia; 3024 struct hostent *hp; 3025 char ip_addr[256]; 3026 extern char *inet_ntoa(); 3027 extern struct hostent *gethostbyaddr(); 3028 3029 #ifdef BSD4_4_SOCKADDR 3030 if (sa->sa_len > sizeof ifr->ifr_addr) 3031 i += sizeof ifr->ifr_name + sa->sa_len; 3032 else 3033 #endif 3034 i += sizeof *ifr; 3035 3036 if (tTd(0, 20)) 3037 printf("%s\n", anynet_ntoa((SOCKADDR *) sa)); 3038 3039 if (ifr->ifr_addr.sa_family != AF_INET) 3040 continue; 3041 3042 /* extract IP address from the list*/ 3043 ia = (((struct sockaddr_in *) sa)->sin_addr); 3044 3045 /* save IP address in text from */ 3046 (void) sprintf(ip_addr, "[%s]", 3047 inet_ntoa(((struct sockaddr_in *) sa)->sin_addr)); 3048 if (!wordinclass(ip_addr, 'w')) 3049 { 3050 setclass('w', ip_addr); 3051 if (tTd(0, 4)) 3052 printf("\ta.k.a.: %s\n", ip_addr); 3053 } 3054 3055 /* skip "loopback" interface "lo" */ 3056 if (strcmp("lo0", ifr->ifr_name) == 0) 3057 continue; 3058 3059 /* lookup name with IP address */ 3060 hp = sm_gethostbyaddr((char *) &ia, sizeof(ia), AF_INET); 3061 if (hp == NULL) 3062 { 3063 syslog(LOG_CRIT, "gethostbyaddr() failed for %s\n", 3064 inet_ntoa(ia)); 3065 continue; 3066 } 3067 3068 /* save its cname */ 3069 if (!wordinclass(hp->h_name, 'w')) 3070 { 3071 setclass('w', hp->h_name); 3072 if (tTd(0, 4)) 3073 printf("\ta.k.a.: %s\n", hp->h_name); 3074 } 3075 3076 /* save all it aliases name */ 3077 while (*hp->h_aliases) 3078 { 3079 if (!wordinclass(*hp->h_aliases, 'w')) 3080 { 3081 setclass('w', *hp->h_aliases); 3082 if (tTd(0, 4)) 3083 printf("\ta.k.a.: %s\n", *hp->h_aliases); 3084 } 3085 hp->h_aliases++; 3086 } 3087 } 3088 #endif 3089 } 3090 /* 3091 ** NI_PROPVAL -- netinfo property value lookup routine 3092 ** 3093 ** Parameters: 3094 ** keydir -- the Netinfo directory name in which to search 3095 ** for the key. 3096 ** keyprop -- the name of the property in which to find the 3097 ** property we are interested. Defaults to "name". 3098 ** keyval -- the value for which we are really searching. 3099 ** valprop -- the property name for the value in which we 3100 ** are interested. 3101 ** sepchar -- if non-nil, this can be multiple-valued, and 3102 ** we should return a string separated by this 3103 ** character. 3104 ** 3105 ** Returns: 3106 ** NULL -- if: 3107 ** 1. the directory is not found 3108 ** 2. the property name is not found 3109 ** 3. the property contains multiple values 3110 ** 4. some error occured 3111 ** else -- the location of the config file. 3112 ** 3113 ** Example: 3114 ** To search for an alias value, use: 3115 ** ni_propval("/aliases", "name", aliasname, "members", ',') 3116 ** 3117 ** Notes: 3118 ** Caller should free the return value of ni_proval 3119 */ 3120 3121 #ifdef NETINFO 3122 3123 # include <netinfo/ni.h> 3124 3125 # define LOCAL_NETINFO_DOMAIN "." 3126 # define PARENT_NETINFO_DOMAIN ".." 3127 # define MAX_NI_LEVELS 256 3128 3129 char * 3130 ni_propval(keydir, keyprop, keyval, valprop, sepchar) 3131 char *keydir; 3132 char *keyprop; 3133 char *keyval; 3134 char *valprop; 3135 char sepchar; 3136 { 3137 char *propval = NULL; 3138 int i; 3139 int j, alen; 3140 void *ni = NULL; 3141 void *lastni = NULL; 3142 ni_status nis; 3143 ni_id nid; 3144 ni_namelist ninl; 3145 register char *p; 3146 char keybuf[1024]; 3147 3148 /* 3149 ** Create the full key from the two parts. 3150 ** 3151 ** Note that directory can end with, e.g., "name=" to specify 3152 ** an alternate search property. 3153 */ 3154 3155 i = strlen(keydir) + strlen(keyval) + 2; 3156 if (keyprop != NULL) 3157 i += strlen(keyprop) + 1; 3158 if (i > sizeof keybuf) 3159 return NULL; 3160 strcpy(keybuf, keydir); 3161 strcat(keybuf, "/"); 3162 if (keyprop != NULL) 3163 { 3164 strcat(keybuf, keyprop); 3165 strcat(keybuf, "="); 3166 } 3167 strcat(keybuf, keyval); 3168 3169 /* 3170 ** If the passed directory and property name are found 3171 ** in one of netinfo domains we need to search (starting 3172 ** from the local domain moving all the way back to the 3173 ** root domain) set propval to the property's value 3174 ** and return it. 3175 */ 3176 3177 for (i = 0; i < MAX_NI_LEVELS; ++i) 3178 { 3179 if (i == 0) 3180 { 3181 nis = ni_open(NULL, LOCAL_NETINFO_DOMAIN, &ni); 3182 } 3183 else 3184 { 3185 if (lastni != NULL) 3186 ni_free(lastni); 3187 lastni = ni; 3188 nis = ni_open(lastni, PARENT_NETINFO_DOMAIN, &ni); 3189 } 3190 3191 /* 3192 ** Don't bother if we didn't get a handle on a 3193 ** proper domain. This is not necessarily an error. 3194 ** We would get a positive ni_status if, for instance 3195 ** we never found the directory or property and tried 3196 ** to open the parent of the root domain! 3197 */ 3198 3199 if (nis != 0) 3200 break; 3201 3202 /* 3203 ** Find the path to the server information. 3204 */ 3205 3206 if (ni_pathsearch(ni, &nid, keybuf) != 0) 3207 continue; 3208 3209 /* 3210 ** Find associated value information. 3211 */ 3212 3213 if (ni_lookupprop(ni, &nid, valprop, &ninl) != 0) 3214 continue; 3215 3216 /* 3217 ** See if we have an acceptable number of values. 3218 */ 3219 3220 if (ninl.ni_namelist_len <= 0) 3221 continue; 3222 3223 if (sepchar == '\0' && ninl.ni_namelist_len > 1) 3224 { 3225 ni_namelist_free(&ninl); 3226 continue; 3227 } 3228 3229 /* 3230 ** Calculate number of bytes needed and build result 3231 */ 3232 3233 alen = 1; 3234 for (j = 0; j < ninl.ni_namelist_len; j++) 3235 alen += strlen(ninl.ni_namelist_val[j]) + 1; 3236 propval = p = xalloc(alen); 3237 for (j = 0; j < ninl.ni_namelist_len; j++) 3238 { 3239 strcpy(p, ninl.ni_namelist_val[j]); 3240 p += strlen(p); 3241 *p++ = sepchar; 3242 } 3243 *--p = '\0'; 3244 3245 ni_namelist_free(&ninl); 3246 } 3247 3248 /* 3249 ** Clean up. 3250 */ 3251 3252 if (ni != NULL) 3253 ni_free(ni); 3254 if (lastni != NULL && ni != lastni) 3255 ni_free(lastni); 3256 3257 return propval; 3258 } 3259 3260 #endif /* NETINFO */ 3261 /* 3262 ** HARD_SYSLOG -- call syslog repeatedly until it works 3263 ** 3264 ** Needed on HP-UX, which apparently doesn't guarantee that 3265 ** syslog succeeds during interrupt handlers. 3266 */ 3267 3268 #ifdef __hpux 3269 3270 # define MAXSYSLOGTRIES 100 3271 # undef syslog 3272 3273 # ifdef __STDC__ 3274 hard_syslog(int pri, char *msg, ...) 3275 # else 3276 hard_syslog(pri, msg, va_alist) 3277 int pri; 3278 char *msg; 3279 va_dcl 3280 # endif 3281 { 3282 int i; 3283 char buf[SYSLOG_BUFSIZE * 2]; 3284 VA_LOCAL_DECL; 3285 3286 VA_START(msg); 3287 vsprintf(buf, msg, ap); 3288 VA_END; 3289 3290 for (i = MAXSYSLOGTRIES; --i >= 0 && syslog(pri, "%s", buf) < 0; ) 3291 continue; 3292 } 3293 3294 #endif 3295 /* 3296 ** LOCAL_HOSTNAME_LENGTH 3297 ** 3298 ** This is required to get sendmail to compile against BIND 4.9.x 3299 ** on Ultrix. 3300 */ 3301 3302 #if defined(ultrix) && NAMED_BIND 3303 3304 # include <resolv.h> 3305 # if __RES >= 19931104 3306 3307 int 3308 local_hostname_length(hostname) 3309 char *hostname; 3310 { 3311 int len_host, len_domain; 3312 3313 if (!*_res.defdname) 3314 res_init(); 3315 len_host = strlen(hostname); 3316 len_domain = strlen(_res.defdname); 3317 if (len_host > len_domain && 3318 (strcasecmp(hostname + len_host - len_domain,_res.defdname) == 0) && 3319 hostname[len_host - len_domain - 1] == '.') 3320 return len_host - len_domain - 1; 3321 else 3322 return 0; 3323 } 3324 3325 # endif 3326 #endif 3327 /* 3328 ** Compile-Time options 3329 */ 3330 3331 char *CompileOptions[] = 3332 { 3333 #if HESIOD 3334 "HESIOD", 3335 #endif 3336 #if LOG 3337 "LOG", 3338 #endif 3339 #if MATCHGECOS 3340 "MATCHGECOS", 3341 #endif 3342 #if NAMED_BIND 3343 "NAMED_BIND", 3344 #endif 3345 #if NDBM 3346 "NDBM", 3347 #endif 3348 #if NETINET 3349 "NETINET", 3350 #endif 3351 #if NETINFO 3352 "NETINFO", 3353 #endif 3354 #if NETISO 3355 "NETISO", 3356 #endif 3357 #if NETNS 3358 "NETNS", 3359 #endif 3360 #if NETUNIX 3361 "NETUNIX", 3362 #endif 3363 #if NETX25 3364 "NETX25", 3365 #endif 3366 #if NEWDB 3367 "NEWDB", 3368 #endif 3369 #if NIS 3370 "NIS", 3371 #endif 3372 #if NISPLUS 3373 "NISPLUS", 3374 #endif 3375 #if SCANF 3376 "SCANF", 3377 #endif 3378 #if SUID_ROOT_FILES_OK 3379 "SUID_ROOT_FILES_OK", 3380 #endif 3381 #if USERDB 3382 "USERDB", 3383 #endif 3384 #if XDEBUG 3385 "XDEBUG", 3386 #endif 3387 #if XLA 3388 "XLA", 3389 #endif 3390 NULL 3391 }; 3392