1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)conf.c 8.147 (Berkeley) 03/31/95"; 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 MimeMode = MM_CVTMIME|MM_PASS8BIT; /* option 8 */ 188 for (i = 0; i < MAXTOCLASS; i++) 189 { 190 TimeOuts.to_q_return[i] = 5 DAYS; /* option T */ 191 TimeOuts.to_q_warning[i] = 0; /* option T */ 192 } 193 ServiceSwitchFile = "/etc/service.switch"; 194 setdefuser(); 195 setupmaps(); 196 setupmailers(); 197 } 198 199 200 /* 201 ** SETDEFUSER -- set/reset DefUser using DefUid (for initgroups()) 202 */ 203 204 void 205 setdefuser() 206 { 207 struct passwd *defpwent; 208 static char defuserbuf[40]; 209 210 DefUser = defuserbuf; 211 if ((defpwent = sm_getpwuid(DefUid)) != NULL) 212 strcpy(defuserbuf, defpwent->pw_name); 213 else 214 strcpy(defuserbuf, "nobody"); 215 } 216 /* 217 ** HOST_MAP_INIT -- initialize host class structures 218 */ 219 220 bool host_map_init __P((MAP *map, char *args)); 221 222 bool 223 host_map_init(map, args) 224 MAP *map; 225 char *args; 226 { 227 register char *p = args; 228 229 for (;;) 230 { 231 while (isascii(*p) && isspace(*p)) 232 p++; 233 if (*p != '-') 234 break; 235 switch (*++p) 236 { 237 case 'a': 238 map->map_app = ++p; 239 break; 240 } 241 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 242 p++; 243 if (*p != '\0') 244 *p++ = '\0'; 245 } 246 if (map->map_app != NULL) 247 map->map_app = newstr(map->map_app); 248 return TRUE; 249 } 250 /* 251 ** SETUPMAILERS -- initialize default mailers 252 */ 253 254 void 255 setupmailers() 256 { 257 char buf[100]; 258 extern void makemailer(); 259 260 strcpy(buf, "prog, P=/bin/sh, F=lsoD, A=sh -c $u"); 261 makemailer(buf); 262 263 strcpy(buf, "*file*, P=/dev/null, F=lsDFMPEou, A=FILE"); 264 makemailer(buf); 265 266 strcpy(buf, "*include*, P=/dev/null, F=su, A=INCLUDE"); 267 makemailer(buf); 268 } 269 /* 270 ** SETUPMAPS -- set up map classes 271 */ 272 273 #define MAPDEF(name, ext, flags, parse, open, close, lookup, store) \ 274 { \ 275 extern bool parse __P((MAP *, char *)); \ 276 extern bool open __P((MAP *, int)); \ 277 extern void close __P((MAP *)); \ 278 extern char *lookup __P((MAP *, char *, char **, int *)); \ 279 extern void store __P((MAP *, char *, char *)); \ 280 s = stab(name, ST_MAPCLASS, ST_ENTER); \ 281 s->s_mapclass.map_cname = name; \ 282 s->s_mapclass.map_ext = ext; \ 283 s->s_mapclass.map_cflags = flags; \ 284 s->s_mapclass.map_parse = parse; \ 285 s->s_mapclass.map_open = open; \ 286 s->s_mapclass.map_close = close; \ 287 s->s_mapclass.map_lookup = lookup; \ 288 s->s_mapclass.map_store = store; \ 289 } 290 291 void 292 setupmaps() 293 { 294 register STAB *s; 295 296 #ifdef NEWDB 297 MAPDEF("hash", ".db", MCF_ALIASOK|MCF_REBUILDABLE, 298 map_parseargs, hash_map_open, db_map_close, 299 db_map_lookup, db_map_store); 300 301 MAPDEF("btree", ".db", MCF_ALIASOK|MCF_REBUILDABLE, 302 map_parseargs, bt_map_open, db_map_close, 303 db_map_lookup, db_map_store); 304 #endif 305 306 #ifdef NDBM 307 MAPDEF("dbm", ".dir", MCF_ALIASOK|MCF_REBUILDABLE, 308 map_parseargs, ndbm_map_open, ndbm_map_close, 309 ndbm_map_lookup, ndbm_map_store); 310 #endif 311 312 #ifdef NIS 313 MAPDEF("nis", NULL, MCF_ALIASOK, 314 map_parseargs, nis_map_open, null_map_close, 315 nis_map_lookup, null_map_store); 316 #endif 317 318 #ifdef NISPLUS 319 MAPDEF("nisplus", NULL, MCF_ALIASOK, 320 map_parseargs, nisplus_map_open, null_map_close, 321 nisplus_map_lookup, null_map_store); 322 #endif 323 324 #ifdef HESIOD 325 MAPDEF("hesiod", NULL, MCF_ALIASOK|MCF_ALIASONLY, 326 map_parseargs, null_map_open, null_map_close, 327 hes_map_lookup, null_map_store); 328 #endif 329 330 #ifdef NETINFO 331 MAPDEF("netinfo", NULL, MCF_ALIASOK, 332 map_parseargs, ni_map_open, null_map_close, 333 ni_map_lookup, null_map_store); 334 #endif 335 336 #if 0 337 MAPDEF("dns", NULL, 0, 338 dns_map_init, null_map_open, null_map_close, 339 dns_map_lookup, null_map_store); 340 #endif 341 342 #if NAMED_BIND 343 /* best MX DNS lookup */ 344 MAPDEF("bestmx", NULL, MCF_OPTFILE, 345 map_parseargs, null_map_open, null_map_close, 346 bestmx_map_lookup, null_map_store); 347 #endif 348 349 MAPDEF("host", NULL, 0, 350 host_map_init, null_map_open, null_map_close, 351 host_map_lookup, null_map_store); 352 353 MAPDEF("text", NULL, MCF_ALIASOK, 354 map_parseargs, text_map_open, null_map_close, 355 text_map_lookup, null_map_store); 356 357 MAPDEF("stab", NULL, MCF_ALIASOK|MCF_ALIASONLY, 358 map_parseargs, stab_map_open, null_map_close, 359 stab_map_lookup, stab_map_store); 360 361 MAPDEF("implicit", NULL, MCF_ALIASOK|MCF_ALIASONLY|MCF_REBUILDABLE, 362 map_parseargs, impl_map_open, impl_map_close, 363 impl_map_lookup, impl_map_store); 364 365 /* access to system passwd file */ 366 MAPDEF("user", NULL, MCF_OPTFILE, 367 map_parseargs, user_map_open, null_map_close, 368 user_map_lookup, null_map_store); 369 370 /* dequote map */ 371 MAPDEF("dequote", NULL, 0, 372 dequote_init, null_map_open, null_map_close, 373 dequote_map, null_map_store); 374 375 #ifdef USERDB 376 /* user database */ 377 MAPDEF("userdb", ".db", 0, 378 map_parseargs, null_map_open, null_map_close, 379 udb_map_lookup, null_map_store); 380 #endif 381 382 /* sequenced maps */ 383 MAPDEF("sequence", NULL, MCF_ALIASOK, 384 seq_map_parse, null_map_open, null_map_close, 385 seq_map_lookup, seq_map_store); 386 387 /* switched interface to sequenced maps */ 388 MAPDEF("switch", NULL, MCF_ALIASOK, 389 map_parseargs, switch_map_open, null_map_close, 390 seq_map_lookup, seq_map_store); 391 } 392 393 #undef MAPDEF 394 /* 395 ** INITHOSTMAPS -- initial host-dependent maps 396 ** 397 ** This should act as an interface to any local service switch 398 ** provided by the host operating system. 399 ** 400 ** Parameters: 401 ** none 402 ** 403 ** Returns: 404 ** none 405 ** 406 ** Side Effects: 407 ** Should define maps "host" and "users" as necessary 408 ** for this OS. If they are not defined, they will get 409 ** a default value later. It should check to make sure 410 ** they are not defined first, since it's possible that 411 ** the config file has provided an override. 412 */ 413 414 void 415 inithostmaps() 416 { 417 register int i; 418 int nmaps; 419 char *maptype[MAXMAPSTACK]; 420 short mapreturn[MAXMAPACTIONS]; 421 char buf[MAXLINE]; 422 423 /* 424 ** Set up default hosts maps. 425 */ 426 427 #if 0 428 nmaps = switch_map_find("hosts", maptype, mapreturn); 429 for (i = 0; i < nmaps; i++) 430 { 431 if (strcmp(maptype[i], "files") == 0 && 432 stab("hosts.files", ST_MAP, ST_FIND) == NULL) 433 { 434 strcpy(buf, "hosts.files text -k 0 -v 1 /etc/hosts"); 435 makemapentry(buf); 436 } 437 #if NAMED_BIND 438 else if (strcmp(maptype[i], "dns") == 0 && 439 stab("hosts.dns", ST_MAP, ST_FIND) == NULL) 440 { 441 strcpy(buf, "hosts.dns dns A"); 442 makemapentry(buf); 443 } 444 #endif 445 #ifdef NISPLUS 446 else if (strcmp(maptype[i], "nisplus") == 0 && 447 stab("hosts.nisplus", ST_MAP, ST_FIND) == NULL) 448 { 449 strcpy(buf, "hosts.nisplus nisplus -k name -v address -d hosts.org_dir"); 450 makemapentry(buf); 451 } 452 #endif 453 #ifdef NIS 454 else if (strcmp(maptype[i], "nis") == 0 && 455 stab("hosts.nis", ST_MAP, ST_FIND) == NULL) 456 { 457 strcpy(buf, "hosts.nis nis -d -k 0 -v 1 hosts.byname"); 458 makemapentry(buf); 459 } 460 #endif 461 } 462 #endif 463 464 /* 465 ** Make sure we have a host map. 466 */ 467 468 if (stab("host", ST_MAP, ST_FIND) == NULL) 469 { 470 /* user didn't initialize: set up host map */ 471 strcpy(buf, "host host"); 472 #if NAMED_BIND 473 if (ConfigLevel >= 2) 474 strcat(buf, " -a."); 475 #endif 476 makemapentry(buf); 477 } 478 479 /* 480 ** Set up default aliases maps 481 */ 482 483 nmaps = switch_map_find("aliases", maptype, mapreturn); 484 for (i = 0; i < nmaps; i++) 485 { 486 if (strcmp(maptype[i], "files") == 0 && 487 stab("aliases.files", ST_MAP, ST_FIND) == NULL) 488 { 489 strcpy(buf, "aliases.files implicit /etc/aliases"); 490 makemapentry(buf); 491 } 492 #ifdef NISPLUS 493 else if (strcmp(maptype[i], "nisplus") == 0 && 494 stab("aliases.nisplus", ST_MAP, ST_FIND) == NULL) 495 { 496 strcpy(buf, "aliases.nisplus nisplus -kalias -vexpansion -d mail_aliases.org_dir"); 497 makemapentry(buf); 498 } 499 #endif 500 #ifdef NIS 501 else if (strcmp(maptype[i], "nis") == 0 && 502 stab("aliases.nis", ST_MAP, ST_FIND) == NULL) 503 { 504 strcpy(buf, "aliases.nis nis -d mail.aliases"); 505 makemapentry(buf); 506 } 507 #endif 508 } 509 if (stab("aliases", ST_MAP, ST_FIND) == NULL) 510 { 511 strcpy(buf, "aliases switch aliases"); 512 makemapentry(buf); 513 } 514 strcpy(buf, "switch:aliases"); 515 setalias(buf); 516 517 #if 0 /* "user" map class is a better choice */ 518 /* 519 ** Set up default users maps. 520 */ 521 522 nmaps = switch_map_find("passwd", maptype, mapreturn); 523 for (i = 0; i < nmaps; i++) 524 { 525 if (strcmp(maptype[i], "files") == 0 && 526 stab("users.files", ST_MAP, ST_FIND) == NULL) 527 { 528 strcpy(buf, "users.files text -m -z: -k0 -v6 /etc/passwd"); 529 makemapentry(buf); 530 } 531 #ifdef NISPLUS 532 else if (strcmp(maptype[i], "nisplus") == 0 && 533 stab("users.nisplus", ST_MAP, ST_FIND) == NULL) 534 { 535 strcpy(buf, "users.nisplus nisplus -m -kname -vhome -d passwd.org_dir"); 536 makemapentry(buf); 537 } 538 #endif 539 #ifdef NIS 540 else if (strcmp(maptype[i], "nis") == 0 && 541 stab("users.nis", ST_MAP, ST_FIND) == NULL) 542 { 543 strcpy(buf, "users.nis nis -m -d passwd.byname"); 544 makemapentry(buf); 545 } 546 #endif 547 #ifdef HESIOD 548 else if (strcmp(maptype[i], "hesiod") == 0) && 549 stab("users.hesiod", ST_MAP, ST_FIND) == NULL) 550 { 551 strcpy(buf, "users.hesiod hesiod"); 552 makemapentry(buf); 553 } 554 #endif 555 } 556 if (stab("users", ST_MAP, ST_FIND) == NULL) 557 { 558 strcpy(buf, "users switch -m passwd"); 559 makemapentry(buf); 560 } 561 #endif 562 } 563 /* 564 ** SWITCH_MAP_FIND -- find the list of types associated with a map 565 ** 566 ** This is the system-dependent interface to the service switch. 567 ** 568 ** Parameters: 569 ** service -- the name of the service of interest. 570 ** maptype -- an out-array of strings containing the types 571 ** of access to use for this service. There can 572 ** be at most MAXMAPSTACK types for a single service. 573 ** mapreturn -- an out-array of return information bitmaps 574 ** for the map. 575 ** 576 ** Returns: 577 ** The number of map types filled in, or -1 for failure. 578 */ 579 580 #ifdef SOLARIS 581 # include <nsswitch.h> 582 #endif 583 584 #if defined(ultrix) || defined(__osf__) 585 # include <sys/svcinfo.h> 586 #endif 587 588 int 589 switch_map_find(service, maptype, mapreturn) 590 char *service; 591 char *maptype[MAXMAPSTACK]; 592 short mapreturn[MAXMAPACTIONS]; 593 { 594 register FILE *fp; 595 int svcno; 596 static char buf[MAXLINE]; 597 598 #ifdef SOLARIS 599 struct __nsw_switchconfig *nsw_conf; 600 enum __nsw_parse_err pserr; 601 struct __nsw_lookup *lk; 602 int nsw_rc; 603 static struct __nsw_lookup lkp0 = 604 { "files", {1, 0, 0, 0}, NULL, NULL }; 605 static struct __nsw_switchconfig lkp_default = 606 { 0, "sendmail", 3, &lkp0 }; 607 608 if ((nsw_conf = __nsw_getconfig(service, &pserr)) == NULL) 609 lk = lkp_default.lookups; 610 else 611 lk = nsw_conf->lookups; 612 svcno = 0; 613 while (lk != NULL) 614 { 615 maptype[svcno] = lk->service_name; 616 if (lk->actions[__NSW_NOTFOUND] == __NSW_RETURN) 617 mapreturn[MA_NOTFOUND] |= 1 << svcno; 618 if (lk->actions[__NSW_TRYAGAIN] == __NSW_RETURN) 619 mapreturn[MA_TRYAGAIN] |= 1 << svcno; 620 if (lk->actions[__NSW_UNAVAIL] == __NSW_RETURN) 621 mapreturn[MA_TRYAGAIN] |= 1 << svcno; 622 svcno++; 623 lk = lk->next; 624 } 625 return svcno; 626 #endif 627 628 #if defined(ultrix) || defined(__osf__) 629 struct svcinfo *svcinfo; 630 int svc; 631 632 svcinfo = getsvc(); 633 if (svcinfo == NULL) 634 goto punt; 635 if (strcmp(service, "hosts") == 0) 636 svc = SVC_HOSTS; 637 else if (strcmp(service, "aliases") == 0) 638 svc = SVC_ALIASES; 639 else if (strcmp(service, "passwd") == 0) 640 svc = SVC_PASSWD; 641 else 642 return -1; 643 for (svcno = 0; svcno < SVC_PATHSIZE; svcno++) 644 { 645 switch (svcinfo->svcpath[svc][svcno]) 646 { 647 case SVC_LOCAL: 648 maptype[svcno] = "files"; 649 break; 650 651 case SVC_YP: 652 maptype[svcno] = "nis"; 653 break; 654 655 case SVC_BIND: 656 maptype[svcno] = "dns"; 657 break; 658 659 #ifdef SVC_HESIOD 660 case SVC_HESIOD: 661 maptype[svcno] = "hesiod"; 662 break; 663 #endif 664 665 case SVC_LAST: 666 return svcno; 667 } 668 } 669 return svcno; 670 #endif 671 672 #if !defined(SOLARIS) && !defined(ultrix) && !defined(__osf__) 673 /* 674 ** Fall-back mechanism. 675 */ 676 677 svcno = 0; 678 fp = fopen(ServiceSwitchFile, "r"); 679 if (fp != NULL) 680 { 681 while (fgets(buf, sizeof buf, fp) != NULL) 682 { 683 register char *p; 684 685 p = strpbrk(buf, "#\n"); 686 if (p != NULL) 687 *p = '\0'; 688 p = strpbrk(buf, " \t"); 689 if (p != NULL) 690 *p++ = '\0'; 691 if (strcmp(buf, service) != 0) 692 continue; 693 694 /* got the right service -- extract data */ 695 do 696 { 697 while (isspace(*p)) 698 p++; 699 if (*p == '\0') 700 break; 701 maptype[svcno++] = p; 702 p = strpbrk(p, " \t"); 703 if (p != NULL) 704 *p++ = '\0'; 705 } while (p != NULL); 706 break; 707 } 708 fclose(fp); 709 return svcno; 710 } 711 #endif 712 713 /* if the service file doesn't work, use an absolute fallback */ 714 punt: 715 if (strcmp(service, "aliases") == 0) 716 { 717 maptype[svcno++] = "files"; 718 #ifdef AUTO_NIS_ALIASES 719 # ifdef NISPLUS 720 maptype[svcno++] = "nisplus"; 721 # endif 722 # ifdef NIS 723 maptype[svcno++] = "nis"; 724 # endif 725 #endif 726 return svcno; 727 } 728 if (strcmp(service, "hosts") == 0) 729 { 730 # if NAMED_BIND 731 maptype[svcno++] = "dns"; 732 # else 733 # if defined(sun) && !defined(BSD) && !defined(SOLARIS) 734 /* SunOS */ 735 maptype[svcno++] = "nis"; 736 # endif 737 # endif 738 maptype[svcno++] = "files"; 739 return svcno; 740 } 741 return -1; 742 } 743 /* 744 ** USERNAME -- return the user id of the logged in user. 745 ** 746 ** Parameters: 747 ** none. 748 ** 749 ** Returns: 750 ** The login name of the logged in user. 751 ** 752 ** Side Effects: 753 ** none. 754 ** 755 ** Notes: 756 ** The return value is statically allocated. 757 */ 758 759 char * 760 username() 761 { 762 static char *myname = NULL; 763 extern char *getlogin(); 764 register struct passwd *pw; 765 766 /* cache the result */ 767 if (myname == NULL) 768 { 769 myname = getlogin(); 770 if (myname == NULL || myname[0] == '\0') 771 { 772 pw = sm_getpwuid(RealUid); 773 if (pw != NULL) 774 myname = newstr(pw->pw_name); 775 } 776 else 777 { 778 uid_t uid = RealUid; 779 780 myname = newstr(myname); 781 if ((pw = sm_getpwnam(myname)) == NULL || 782 (uid != 0 && uid != pw->pw_uid)) 783 { 784 pw = sm_getpwuid(uid); 785 if (pw != NULL) 786 myname = newstr(pw->pw_name); 787 } 788 } 789 if (myname == NULL || myname[0] == '\0') 790 { 791 syserr("554 Who are you?"); 792 myname = "postmaster"; 793 } 794 } 795 796 return (myname); 797 } 798 /* 799 ** TTYPATH -- Get the path of the user's tty 800 ** 801 ** Returns the pathname of the user's tty. Returns NULL if 802 ** the user is not logged in or if s/he has write permission 803 ** denied. 804 ** 805 ** Parameters: 806 ** none 807 ** 808 ** Returns: 809 ** pathname of the user's tty. 810 ** NULL if not logged in or write permission denied. 811 ** 812 ** Side Effects: 813 ** none. 814 ** 815 ** WARNING: 816 ** Return value is in a local buffer. 817 ** 818 ** Called By: 819 ** savemail 820 */ 821 822 char * 823 ttypath() 824 { 825 struct stat stbuf; 826 register char *pathn; 827 extern char *ttyname(); 828 extern char *getlogin(); 829 830 /* compute the pathname of the controlling tty */ 831 if ((pathn = ttyname(2)) == NULL && (pathn = ttyname(1)) == NULL && 832 (pathn = ttyname(0)) == NULL) 833 { 834 errno = 0; 835 return (NULL); 836 } 837 838 /* see if we have write permission */ 839 if (stat(pathn, &stbuf) < 0 || !bitset(02, stbuf.st_mode)) 840 { 841 errno = 0; 842 return (NULL); 843 } 844 845 /* see if the user is logged in */ 846 if (getlogin() == NULL) 847 return (NULL); 848 849 /* looks good */ 850 return (pathn); 851 } 852 /* 853 ** CHECKCOMPAT -- check for From and To person compatible. 854 ** 855 ** This routine can be supplied on a per-installation basis 856 ** to determine whether a person is allowed to send a message. 857 ** This allows restriction of certain types of internet 858 ** forwarding or registration of users. 859 ** 860 ** If the hosts are found to be incompatible, an error 861 ** message should be given using "usrerr" and 0 should 862 ** be returned. 863 ** 864 ** EF_NO_BODY_RETN can be set in e->e_flags to suppress the 865 ** body during the return-to-sender function; this should be done 866 ** on huge messages. This bit may already be set by the ESMTP 867 ** protocol. 868 ** 869 ** Parameters: 870 ** to -- the person being sent to. 871 ** 872 ** Returns: 873 ** an exit status 874 ** 875 ** Side Effects: 876 ** none (unless you include the usrerr stuff) 877 */ 878 879 int 880 checkcompat(to, e) 881 register ADDRESS *to; 882 register ENVELOPE *e; 883 { 884 # ifdef lint 885 if (to == NULL) 886 to++; 887 # endif /* lint */ 888 889 if (tTd(49, 1)) 890 printf("checkcompat(to=%s, from=%s)\n", 891 to->q_paddr, e->e_from.q_paddr); 892 893 # ifdef EXAMPLE_CODE 894 /* this code is intended as an example only */ 895 register STAB *s; 896 897 s = stab("arpa", ST_MAILER, ST_FIND); 898 if (s != NULL && strcmp(e->e_from.q_mailer->m_name, "local") != 0 && 899 to->q_mailer == s->s_mailer) 900 { 901 usrerr("553 No ARPA mail through this machine: see your system administration"); 902 /* e->e_flags |= EF_NO_BODY_RETN; to supress body on return */ 903 return (EX_UNAVAILABLE); 904 } 905 # endif /* EXAMPLE_CODE */ 906 return (EX_OK); 907 } 908 /* 909 ** SETSIGNAL -- set a signal handler 910 ** 911 ** This is essentially old BSD "signal(3)". 912 */ 913 914 sigfunc_t 915 setsignal(sig, handler) 916 int sig; 917 sigfunc_t handler; 918 { 919 #if defined(SYS5SIGNALS) || defined(BSD4_3) || defined(_AUX_SOURCE) 920 return signal(sig, handler); 921 #else 922 struct sigaction n, o; 923 924 bzero(&n, sizeof n); 925 n.sa_handler = handler; 926 # ifdef SA_RESTART 927 n.sa_flags = SA_RESTART; 928 # endif 929 if (sigaction(sig, &n, &o) < 0) 930 return SIG_ERR; 931 return o.sa_handler; 932 #endif 933 } 934 /* 935 ** HOLDSIGS -- arrange to hold all signals 936 ** 937 ** Parameters: 938 ** none. 939 ** 940 ** Returns: 941 ** none. 942 ** 943 ** Side Effects: 944 ** Arranges that signals are held. 945 */ 946 947 void 948 holdsigs() 949 { 950 } 951 /* 952 ** RLSESIGS -- arrange to release all signals 953 ** 954 ** This undoes the effect of holdsigs. 955 ** 956 ** Parameters: 957 ** none. 958 ** 959 ** Returns: 960 ** none. 961 ** 962 ** Side Effects: 963 ** Arranges that signals are released. 964 */ 965 966 void 967 rlsesigs() 968 { 969 } 970 /* 971 ** INIT_MD -- do machine dependent initializations 972 ** 973 ** Systems that have global modes that should be set should do 974 ** them here rather than in main. 975 */ 976 977 #ifdef _AUX_SOURCE 978 # include <compat.h> 979 #endif 980 981 void 982 init_md(argc, argv) 983 int argc; 984 char **argv; 985 { 986 #ifdef _AUX_SOURCE 987 setcompat(getcompat() | COMPAT_BSDPROT); 988 #endif 989 990 #ifdef VENDOR_DEFAULT 991 VendorCode = VENDOR_DEFAULT; 992 #else 993 VendorCode = VENDOR_BERKELEY; 994 #endif 995 } 996 /* 997 ** INIT_VENDOR_MACROS -- vendor-dependent macro initializations 998 ** 999 ** Called once, on startup. 1000 ** 1001 ** Parameters: 1002 ** e -- the global envelope. 1003 ** 1004 ** Returns: 1005 ** none. 1006 ** 1007 ** Side Effects: 1008 ** vendor-dependent. 1009 */ 1010 1011 void 1012 init_vendor_macros(e) 1013 register ENVELOPE *e; 1014 { 1015 } 1016 /* 1017 ** GETLA -- get the current load average 1018 ** 1019 ** This code stolen from la.c. 1020 ** 1021 ** Parameters: 1022 ** none. 1023 ** 1024 ** Returns: 1025 ** The current load average as an integer. 1026 ** 1027 ** Side Effects: 1028 ** none. 1029 */ 1030 1031 /* try to guess what style of load average we have */ 1032 #define LA_ZERO 1 /* always return load average as zero */ 1033 #define LA_INT 2 /* read kmem for avenrun; interpret as long */ 1034 #define LA_FLOAT 3 /* read kmem for avenrun; interpret as float */ 1035 #define LA_SUBR 4 /* call getloadavg */ 1036 #define LA_MACH 5 /* MACH load averages (as on NeXT boxes) */ 1037 #define LA_SHORT 6 /* read kmem for avenrun; interpret as short */ 1038 #define LA_PROCSTR 7 /* read string ("1.17") from /proc/loadavg */ 1039 1040 /* do guesses based on general OS type */ 1041 #ifndef LA_TYPE 1042 # define LA_TYPE LA_ZERO 1043 #endif 1044 1045 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_FLOAT) || (LA_TYPE == LA_SHORT) 1046 1047 #include <nlist.h> 1048 1049 #ifdef IRIX64 1050 # define nlist nlist64 1051 #endif 1052 1053 #ifndef LA_AVENRUN 1054 # ifdef SYSTEM5 1055 # define LA_AVENRUN "avenrun" 1056 # else 1057 # define LA_AVENRUN "_avenrun" 1058 # endif 1059 #endif 1060 1061 /* _PATH_UNIX should be defined in <paths.h> */ 1062 #ifndef _PATH_UNIX 1063 # if defined(SYSTEM5) 1064 # define _PATH_UNIX "/unix" 1065 # else 1066 # define _PATH_UNIX "/vmunix" 1067 # endif 1068 #endif 1069 1070 struct nlist Nl[] = 1071 { 1072 { LA_AVENRUN }, 1073 #define X_AVENRUN 0 1074 { 0 }, 1075 }; 1076 1077 #ifndef FSHIFT 1078 # if defined(unixpc) 1079 # define FSHIFT 5 1080 # endif 1081 1082 # if defined(__alpha) || defined(IRIX) 1083 # define FSHIFT 10 1084 # endif 1085 1086 # if defined(_AIX3) 1087 # define FSHIFT 16 1088 # endif 1089 #endif 1090 1091 #ifndef FSHIFT 1092 # define FSHIFT 8 1093 #endif 1094 1095 #ifndef FSCALE 1096 # define FSCALE (1 << FSHIFT) 1097 #endif 1098 1099 getla() 1100 { 1101 static int kmem = -1; 1102 #if LA_TYPE == LA_INT 1103 long avenrun[3]; 1104 #else 1105 # if LA_TYPE == LA_SHORT 1106 short avenrun[3]; 1107 # else 1108 double avenrun[3]; 1109 # endif 1110 #endif 1111 extern off_t lseek(); 1112 extern int errno; 1113 1114 if (kmem < 0) 1115 { 1116 kmem = open("/dev/kmem", 0, 0); 1117 if (kmem < 0) 1118 { 1119 if (tTd(3, 1)) 1120 printf("getla: open(/dev/kmem): %s\n", 1121 errstring(errno)); 1122 return (-1); 1123 } 1124 (void) fcntl(kmem, F_SETFD, 1); 1125 #ifdef _AIX3 1126 if (knlist(Nl, 1, sizeof Nl[0]) < 0) 1127 #else 1128 if (nlist(_PATH_UNIX, Nl) < 0) 1129 #endif 1130 { 1131 if (tTd(3, 1)) 1132 printf("getla: nlist(%s): %s\n", _PATH_UNIX, 1133 errstring(errno)); 1134 return (-1); 1135 } 1136 if (Nl[X_AVENRUN].n_value == 0) 1137 { 1138 if (tTd(3, 1)) 1139 printf("getla: nlist(%s, %s) ==> 0\n", 1140 _PATH_UNIX, LA_AVENRUN); 1141 return (-1); 1142 } 1143 #ifdef NAMELISTMASK 1144 Nl[X_AVENRUN].n_value &= NAMELISTMASK; 1145 #endif 1146 } 1147 if (tTd(3, 20)) 1148 printf("getla: symbol address = %#x\n", Nl[X_AVENRUN].n_value); 1149 if (lseek(kmem, (off_t) Nl[X_AVENRUN].n_value, SEEK_SET) == -1 || 1150 read(kmem, (char *) avenrun, sizeof(avenrun)) < sizeof(avenrun)) 1151 { 1152 /* thank you Ian */ 1153 if (tTd(3, 1)) 1154 printf("getla: lseek or read: %s\n", errstring(errno)); 1155 return (-1); 1156 } 1157 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 1158 if (tTd(3, 5)) 1159 { 1160 printf("getla: avenrun = %d", avenrun[0]); 1161 if (tTd(3, 15)) 1162 printf(", %d, %d", avenrun[1], avenrun[2]); 1163 printf("\n"); 1164 } 1165 if (tTd(3, 1)) 1166 printf("getla: %d\n", (int) (avenrun[0] + FSCALE/2) >> FSHIFT); 1167 return ((int) (avenrun[0] + FSCALE/2) >> FSHIFT); 1168 #else 1169 if (tTd(3, 5)) 1170 { 1171 printf("getla: avenrun = %g", avenrun[0]); 1172 if (tTd(3, 15)) 1173 printf(", %g, %g", avenrun[1], avenrun[2]); 1174 printf("\n"); 1175 } 1176 if (tTd(3, 1)) 1177 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 1178 return ((int) (avenrun[0] + 0.5)); 1179 #endif 1180 } 1181 1182 #else 1183 #if LA_TYPE == LA_SUBR 1184 1185 #ifdef DGUX 1186 1187 #include <sys/dg_sys_info.h> 1188 1189 int 1190 getla() 1191 { 1192 struct dg_sys_info_load_info load_info; 1193 1194 dg_sys_info((long *)&load_info, 1195 DG_SYS_INFO_LOAD_INFO_TYPE, DG_SYS_INFO_LOAD_VERSION_0); 1196 1197 if (tTd(3, 1)) 1198 printf("getla: %d\n", (int) (load_info.one_minute + 0.5)); 1199 1200 return((int) (load_info.one_minute + 0.5)); 1201 } 1202 1203 #else 1204 # ifdef __hpux 1205 1206 # include <sys/param.h> 1207 # include <sys/pstat.h> 1208 1209 int 1210 getla() 1211 { 1212 struct pst_dynamic pstd; 1213 1214 if (pstat_getdynamic(&pstd, sizeof(struct pst_dynamic), 1215 (size_t) 1 ,0) == -1) 1216 return 0; 1217 1218 if (tTd(3, 1)) 1219 printf("getla: %d\n", (int) (pstd.psd_avg_1_min + 0.5)); 1220 1221 return (int) (pstd.psd_avg_1_min + 0.5); 1222 } 1223 1224 # else 1225 1226 int 1227 getla() 1228 { 1229 double avenrun[3]; 1230 1231 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) < 0) 1232 { 1233 if (tTd(3, 1)) 1234 perror("getla: getloadavg failed:"); 1235 return (-1); 1236 } 1237 if (tTd(3, 1)) 1238 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 1239 return ((int) (avenrun[0] + 0.5)); 1240 } 1241 1242 # endif /* __hpux */ 1243 #endif /* DGUX */ 1244 #else 1245 #if LA_TYPE == LA_MACH 1246 1247 /* 1248 ** This has been tested on NEXTSTEP release 2.1/3.X. 1249 */ 1250 1251 #if defined(NX_CURRENT_COMPILER_RELEASE) && NX_CURRENT_COMPILER_RELEASE > NX_COMPILER_RELEASE_3_0 1252 # include <mach/mach.h> 1253 #else 1254 # include <mach.h> 1255 #endif 1256 1257 getla() 1258 { 1259 processor_set_t default_set; 1260 kern_return_t error; 1261 unsigned int info_count; 1262 struct processor_set_basic_info info; 1263 host_t host; 1264 1265 error = processor_set_default(host_self(), &default_set); 1266 if (error != KERN_SUCCESS) 1267 return -1; 1268 info_count = PROCESSOR_SET_BASIC_INFO_COUNT; 1269 if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, 1270 &host, (processor_set_info_t)&info, 1271 &info_count) != KERN_SUCCESS) 1272 { 1273 return -1; 1274 } 1275 return (int) (info.load_average + (LOAD_SCALE / 2)) / LOAD_SCALE; 1276 } 1277 1278 1279 #else 1280 #if LA_TYPE == LA_PROCSTR 1281 1282 /* 1283 ** Read /proc/loadavg for the load average. This is assumed to be 1284 ** in a format like "0.15 0.12 0.06". 1285 ** 1286 ** Initially intended for Linux. This has been in the kernel 1287 ** since at least 0.99.15. 1288 */ 1289 1290 # ifndef _PATH_LOADAVG 1291 # define _PATH_LOADAVG "/proc/loadavg" 1292 # endif 1293 1294 int 1295 getla() 1296 { 1297 double avenrun; 1298 register int result; 1299 FILE *fp; 1300 1301 fp = fopen(_PATH_LOADAVG, "r"); 1302 if (fp == NULL) 1303 { 1304 if (tTd(3, 1)) 1305 printf("getla: fopen(%s): %s\n", 1306 _PATH_LOADAVG, errstring(errno)); 1307 return -1; 1308 } 1309 result = fscanf(fp, "%lf", &avenrun); 1310 fclose(fp); 1311 if (result != 1) 1312 { 1313 if (tTd(3, 1)) 1314 printf("getla: fscanf() = %d: %s\n", 1315 result, errstring(errno)); 1316 return -1; 1317 } 1318 1319 if (tTd(3, 1)) 1320 printf("getla(): %.2f\n", avenrun); 1321 1322 return ((int) (avenrun + 0.5)); 1323 } 1324 1325 #else 1326 1327 getla() 1328 { 1329 if (tTd(3, 1)) 1330 printf("getla: ZERO\n"); 1331 return (0); 1332 } 1333 1334 #endif 1335 #endif 1336 #endif 1337 #endif 1338 1339 1340 /* 1341 * Copyright 1989 Massachusetts Institute of Technology 1342 * 1343 * Permission to use, copy, modify, distribute, and sell this software and its 1344 * documentation for any purpose is hereby granted without fee, provided that 1345 * the above copyright notice appear in all copies and that both that 1346 * copyright notice and this permission notice appear in supporting 1347 * documentation, and that the name of M.I.T. not be used in advertising or 1348 * publicity pertaining to distribution of the software without specific, 1349 * written prior permission. M.I.T. makes no representations about the 1350 * suitability of this software for any purpose. It is provided "as is" 1351 * without express or implied warranty. 1352 * 1353 * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL 1354 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T. 1355 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 1356 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 1357 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 1358 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 1359 * 1360 * Authors: Many and varied... 1361 */ 1362 1363 /* Non Apollo stuff removed by Don Lewis 11/15/93 */ 1364 #ifndef lint 1365 static char rcsid[] = "@(#)$Id: getloadavg.c,v 1.16 1991/06/21 12:51:15 paul Exp $"; 1366 #endif /* !lint */ 1367 1368 #ifdef apollo 1369 # undef volatile 1370 # include <apollo/base.h> 1371 1372 /* ARGSUSED */ 1373 int getloadavg( call_data ) 1374 caddr_t call_data; /* pointer to (double) return value */ 1375 { 1376 double *avenrun = (double *) call_data; 1377 int i; 1378 status_$t st; 1379 long loadav[3]; 1380 proc1_$get_loadav(loadav, &st); 1381 *avenrun = loadav[0] / (double) (1 << 16); 1382 return(0); 1383 } 1384 # endif /* apollo */ 1385 /* 1386 ** SHOULDQUEUE -- should this message be queued or sent? 1387 ** 1388 ** Compares the message cost to the load average to decide. 1389 ** 1390 ** Parameters: 1391 ** pri -- the priority of the message in question. 1392 ** ctime -- the message creation time. 1393 ** 1394 ** Returns: 1395 ** TRUE -- if this message should be queued up for the 1396 ** time being. 1397 ** FALSE -- if the load is low enough to send this message. 1398 ** 1399 ** Side Effects: 1400 ** none. 1401 */ 1402 1403 bool 1404 shouldqueue(pri, ctime) 1405 long pri; 1406 time_t ctime; 1407 { 1408 bool rval; 1409 1410 if (tTd(3, 30)) 1411 printf("shouldqueue: CurrentLA=%d, pri=%d: ", CurrentLA, pri); 1412 if (CurrentLA < QueueLA) 1413 { 1414 if (tTd(3, 30)) 1415 printf("FALSE (CurrentLA < QueueLA)\n"); 1416 return (FALSE); 1417 } 1418 if (CurrentLA >= RefuseLA) 1419 { 1420 if (tTd(3, 30)) 1421 printf("TRUE (CurrentLA >= RefuseLA)\n"); 1422 return (TRUE); 1423 } 1424 rval = pri > (QueueFactor / (CurrentLA - QueueLA + 1)); 1425 if (tTd(3, 30)) 1426 printf("%s (by calculation)\n", rval ? "TRUE" : "FALSE"); 1427 return rval; 1428 } 1429 /* 1430 ** REFUSECONNECTIONS -- decide if connections should be refused 1431 ** 1432 ** Parameters: 1433 ** none. 1434 ** 1435 ** Returns: 1436 ** TRUE if incoming SMTP connections should be refused 1437 ** (for now). 1438 ** FALSE if we should accept new work. 1439 ** 1440 ** Side Effects: 1441 ** none. 1442 */ 1443 1444 bool 1445 refuseconnections() 1446 { 1447 extern bool enoughspace(); 1448 1449 #ifdef XLA 1450 if (!xla_smtp_ok()) 1451 return TRUE; 1452 #endif 1453 1454 /* this is probably too simplistic */ 1455 return CurrentLA >= RefuseLA || !enoughspace(MinBlocksFree + 1); 1456 } 1457 /* 1458 ** SETPROCTITLE -- set process title for ps 1459 ** 1460 ** Parameters: 1461 ** fmt -- a printf style format string. 1462 ** a, b, c -- possible parameters to fmt. 1463 ** 1464 ** Returns: 1465 ** none. 1466 ** 1467 ** Side Effects: 1468 ** Clobbers argv of our main procedure so ps(1) will 1469 ** display the title. 1470 */ 1471 1472 #define SPT_NONE 0 /* don't use it at all */ 1473 #define SPT_REUSEARGV 1 /* cover argv with title information */ 1474 #define SPT_BUILTIN 2 /* use libc builtin */ 1475 #define SPT_PSTAT 3 /* use pstat(PSTAT_SETCMD, ...) */ 1476 #define SPT_PSSTRINGS 4 /* use PS_STRINGS->... */ 1477 #define SPT_WRITEUDOT 5 /* write u. area in kmem */ 1478 1479 #ifndef SPT_TYPE 1480 # define SPT_TYPE SPT_REUSEARGV 1481 #endif 1482 1483 #if SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN 1484 1485 # if SPT_TYPE == SPT_PSTAT 1486 # include <sys/pstat.h> 1487 # endif 1488 # if SPT_TYPE == SPT_PSSTRINGS 1489 # include <machine/vmparam.h> 1490 # include <sys/exec.h> 1491 # ifndef PS_STRINGS /* hmmmm.... apparently not available after all */ 1492 # undef SPT_TYPE 1493 # define SPT_TYPE SPT_REUSEARGV 1494 # endif 1495 # endif 1496 1497 # if SPT_TYPE == SPT_PSSTRINGS 1498 # define SETPROC_STATIC static 1499 # else 1500 # define SETPROC_STATIC 1501 # endif 1502 1503 # ifndef SPT_PADCHAR 1504 # define SPT_PADCHAR ' ' 1505 # endif 1506 1507 #endif /* SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN */ 1508 1509 #if SPT_TYPE != SPT_BUILTIN 1510 1511 /*VARARGS1*/ 1512 void 1513 # ifdef __STDC__ 1514 setproctitle(char *fmt, ...) 1515 # else 1516 setproctitle(fmt, va_alist) 1517 char *fmt; 1518 va_dcl 1519 # endif 1520 { 1521 # if SPT_TYPE != SPT_NONE 1522 register char *p; 1523 register int i; 1524 SETPROC_STATIC char buf[MAXLINE]; 1525 VA_LOCAL_DECL 1526 # if SPT_TYPE == SPT_PSTAT 1527 union pstun pst; 1528 # endif 1529 extern char **Argv; 1530 extern char *LastArgv; 1531 1532 p = buf; 1533 1534 /* print sendmail: heading for grep */ 1535 (void) strcpy(p, "sendmail: "); 1536 p += strlen(p); 1537 1538 /* print the argument string */ 1539 VA_START(fmt); 1540 (void) vsprintf(p, fmt, ap); 1541 VA_END; 1542 1543 i = strlen(buf); 1544 1545 # if SPT_TYPE == SPT_PSTAT 1546 pst.pst_command = buf; 1547 pstat(PSTAT_SETCMD, pst, i, 0, 0); 1548 # else 1549 # if SPT_TYPE == SPT_PSSTRINGS 1550 PS_STRINGS->ps_nargvstr = 1; 1551 PS_STRINGS->ps_argvstr = buf; 1552 # else 1553 if (i > LastArgv - Argv[0] - 2) 1554 { 1555 i = LastArgv - Argv[0] - 2; 1556 buf[i] = '\0'; 1557 } 1558 (void) strcpy(Argv[0], buf); 1559 p = &Argv[0][i]; 1560 while (p < LastArgv) 1561 *p++ = SPT_PADCHAR; 1562 Argv[1] = NULL; 1563 # endif /* SPT_TYPE == SPT_PSSTRINGS */ 1564 # endif /* SPT_TYPE == SPT_PSTAT */ 1565 # endif /* SPT_TYPE != SPT_NONE */ 1566 } 1567 1568 #endif /* SPT_TYPE != SPT_BUILTIN */ 1569 /* 1570 ** REAPCHILD -- pick up the body of my child, lest it become a zombie 1571 ** 1572 ** Parameters: 1573 ** sig -- the signal that got us here (unused). 1574 ** 1575 ** Returns: 1576 ** none. 1577 ** 1578 ** Side Effects: 1579 ** Picks up extant zombies. 1580 */ 1581 1582 void 1583 reapchild(sig) 1584 int sig; 1585 { 1586 int olderrno = errno; 1587 # ifdef HASWAITPID 1588 auto int status; 1589 int count; 1590 int pid; 1591 1592 count = 0; 1593 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) 1594 { 1595 if (count++ > 1000) 1596 { 1597 #ifdef LOG 1598 syslog(LOG_ALERT, "reapchild: waitpid loop: pid=%d, status=%x", 1599 pid, status); 1600 #endif 1601 break; 1602 } 1603 } 1604 # else 1605 # ifdef WNOHANG 1606 union wait status; 1607 1608 while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) 1609 continue; 1610 # else /* WNOHANG */ 1611 auto int status; 1612 1613 while (wait(&status) > 0) 1614 continue; 1615 # endif /* WNOHANG */ 1616 # endif 1617 # ifdef SYS5SIGNALS 1618 (void) setsignal(SIGCHLD, reapchild); 1619 # endif 1620 errno = olderrno; 1621 } 1622 /* 1623 ** UNSETENV -- remove a variable from the environment 1624 ** 1625 ** Not needed on newer systems. 1626 ** 1627 ** Parameters: 1628 ** name -- the string name of the environment variable to be 1629 ** deleted from the current environment. 1630 ** 1631 ** Returns: 1632 ** none. 1633 ** 1634 ** Globals: 1635 ** environ -- a pointer to the current environment. 1636 ** 1637 ** Side Effects: 1638 ** Modifies environ. 1639 */ 1640 1641 #ifndef HASUNSETENV 1642 1643 void 1644 unsetenv(name) 1645 char *name; 1646 { 1647 extern char **environ; 1648 register char **pp; 1649 int len = strlen(name); 1650 1651 for (pp = environ; *pp != NULL; pp++) 1652 { 1653 if (strncmp(name, *pp, len) == 0 && 1654 ((*pp)[len] == '=' || (*pp)[len] == '\0')) 1655 break; 1656 } 1657 1658 for (; *pp != NULL; pp++) 1659 *pp = pp[1]; 1660 } 1661 1662 #endif 1663 /* 1664 ** GETDTABLESIZE -- return number of file descriptors 1665 ** 1666 ** Only on non-BSD systems 1667 ** 1668 ** Parameters: 1669 ** none 1670 ** 1671 ** Returns: 1672 ** size of file descriptor table 1673 ** 1674 ** Side Effects: 1675 ** none 1676 */ 1677 1678 #ifdef SOLARIS 1679 # include <sys/resource.h> 1680 #endif 1681 1682 int 1683 getdtsize() 1684 { 1685 #ifdef RLIMIT_NOFILE 1686 struct rlimit rl; 1687 1688 if (getrlimit(RLIMIT_NOFILE, &rl) >= 0) 1689 return rl.rlim_cur; 1690 #endif 1691 1692 # ifdef HASGETDTABLESIZE 1693 return getdtablesize(); 1694 # else 1695 # ifdef _SC_OPEN_MAX 1696 return sysconf(_SC_OPEN_MAX); 1697 # else 1698 return NOFILE; 1699 # endif 1700 # endif 1701 } 1702 /* 1703 ** UNAME -- get the UUCP name of this system. 1704 */ 1705 1706 #ifndef HASUNAME 1707 1708 int 1709 uname(name) 1710 struct utsname *name; 1711 { 1712 FILE *file; 1713 char *n; 1714 1715 name->nodename[0] = '\0'; 1716 1717 /* try /etc/whoami -- one line with the node name */ 1718 if ((file = fopen("/etc/whoami", "r")) != NULL) 1719 { 1720 (void) fgets(name->nodename, NODE_LENGTH + 1, file); 1721 (void) fclose(file); 1722 n = strchr(name->nodename, '\n'); 1723 if (n != NULL) 1724 *n = '\0'; 1725 if (name->nodename[0] != '\0') 1726 return (0); 1727 } 1728 1729 /* try /usr/include/whoami.h -- has a #define somewhere */ 1730 if ((file = fopen("/usr/include/whoami.h", "r")) != NULL) 1731 { 1732 char buf[MAXLINE]; 1733 1734 while (fgets(buf, MAXLINE, file) != NULL) 1735 if (sscanf(buf, "#define sysname \"%*[^\"]\"", 1736 NODE_LENGTH, name->nodename) > 0) 1737 break; 1738 (void) fclose(file); 1739 if (name->nodename[0] != '\0') 1740 return (0); 1741 } 1742 1743 #ifdef TRUST_POPEN 1744 /* 1745 ** Popen is known to have security holes. 1746 */ 1747 1748 /* try uuname -l to return local name */ 1749 if ((file = popen("uuname -l", "r")) != NULL) 1750 { 1751 (void) fgets(name, NODE_LENGTH + 1, file); 1752 (void) pclose(file); 1753 n = strchr(name, '\n'); 1754 if (n != NULL) 1755 *n = '\0'; 1756 if (name->nodename[0] != '\0') 1757 return (0); 1758 } 1759 #endif 1760 1761 return (-1); 1762 } 1763 #endif /* HASUNAME */ 1764 /* 1765 ** INITGROUPS -- initialize groups 1766 ** 1767 ** Stub implementation for System V style systems 1768 */ 1769 1770 #ifndef HASINITGROUPS 1771 1772 initgroups(name, basegid) 1773 char *name; 1774 int basegid; 1775 { 1776 return 0; 1777 } 1778 1779 #endif 1780 /* 1781 ** SETSID -- set session id (for non-POSIX systems) 1782 */ 1783 1784 #ifndef HASSETSID 1785 1786 pid_t 1787 setsid __P ((void)) 1788 { 1789 #ifdef TIOCNOTTY 1790 int fd; 1791 1792 fd = open("/dev/tty", O_RDWR, 0); 1793 if (fd >= 0) 1794 { 1795 (void) ioctl(fd, (int) TIOCNOTTY, (char *) 0); 1796 (void) close(fd); 1797 } 1798 #endif /* TIOCNOTTY */ 1799 # ifdef SYS5SETPGRP 1800 return setpgrp(); 1801 # else 1802 return setpgid(0, getpid()); 1803 # endif 1804 } 1805 1806 #endif 1807 /* 1808 ** FSYNC -- dummy fsync 1809 */ 1810 1811 #ifdef NEEDFSYNC 1812 1813 fsync(fd) 1814 int fd; 1815 { 1816 # ifdef O_SYNC 1817 return fcntl(fd, F_SETFL, O_SYNC); 1818 # else 1819 /* nothing we can do */ 1820 return 0; 1821 # endif 1822 } 1823 1824 #endif 1825 /* 1826 ** DGUX_INET_ADDR -- inet_addr for DG/UX 1827 ** 1828 ** Data General DG/UX version of inet_addr returns a struct in_addr 1829 ** instead of a long. This patches things. Only needed on versions 1830 ** prior to 5.4.3. 1831 */ 1832 1833 #ifdef DGUX_5_4_2 1834 1835 #undef inet_addr 1836 1837 long 1838 dgux_inet_addr(host) 1839 char *host; 1840 { 1841 struct in_addr haddr; 1842 1843 haddr = inet_addr(host); 1844 return haddr.s_addr; 1845 } 1846 1847 #endif 1848 /* 1849 ** GETOPT -- for old systems or systems with bogus implementations 1850 */ 1851 1852 #ifdef NEEDGETOPT 1853 1854 /* 1855 * Copyright (c) 1985 Regents of the University of California. 1856 * All rights reserved. The Berkeley software License Agreement 1857 * specifies the terms and conditions for redistribution. 1858 */ 1859 1860 1861 /* 1862 ** this version hacked to add `atend' flag to allow state machine 1863 ** to reset if invoked by the program to scan args for a 2nd time 1864 */ 1865 1866 #if defined(LIBC_SCCS) && !defined(lint) 1867 static char sccsid[] = "@(#)getopt.c 4.3 (Berkeley) 3/9/86"; 1868 #endif /* LIBC_SCCS and not lint */ 1869 1870 #include <stdio.h> 1871 1872 /* 1873 * get option letter from argument vector 1874 */ 1875 #ifdef _CONVEX_SOURCE 1876 extern int optind, opterr, optopt; 1877 extern char *optarg; 1878 #else 1879 int opterr = 1; /* if error message should be printed */ 1880 int optind = 1; /* index into parent argv vector */ 1881 int optopt = 0; /* character checked for validity */ 1882 char *optarg = NULL; /* argument associated with option */ 1883 #endif 1884 1885 #define BADCH (int)'?' 1886 #define EMSG "" 1887 #define tell(s) if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \ 1888 fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);} 1889 1890 getopt(nargc,nargv,ostr) 1891 int nargc; 1892 char *const *nargv; 1893 const char *ostr; 1894 { 1895 static char *place = EMSG; /* option letter processing */ 1896 static char atend = 0; 1897 register char *oli; /* option letter list index */ 1898 1899 if (atend) { 1900 atend = 0; 1901 place = EMSG; 1902 } 1903 if(!*place) { /* update scanning pointer */ 1904 if (optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) { 1905 atend++; 1906 return(EOF); 1907 } 1908 if (*place == '-') { /* found "--" */ 1909 ++optind; 1910 atend++; 1911 return(EOF); 1912 } 1913 } /* option letter okay? */ 1914 if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr,optopt))) { 1915 if (!*place) ++optind; 1916 tell(": illegal option -- "); 1917 } 1918 if (*++oli != ':') { /* don't need argument */ 1919 optarg = NULL; 1920 if (!*place) ++optind; 1921 } 1922 else { /* need an argument */ 1923 if (*place) optarg = place; /* no white space */ 1924 else if (nargc <= ++optind) { /* no arg */ 1925 place = EMSG; 1926 tell(": option requires an argument -- "); 1927 } 1928 else optarg = nargv[optind]; /* white space */ 1929 place = EMSG; 1930 ++optind; 1931 } 1932 return(optopt); /* dump back option letter */ 1933 } 1934 1935 #endif 1936 /* 1937 ** VFPRINTF, VSPRINTF -- for old 4.3 BSD systems missing a real version 1938 */ 1939 1940 #ifdef NEEDVPRINTF 1941 1942 #define MAXARG 16 1943 1944 vfprintf(fp, fmt, ap) 1945 FILE * fp; 1946 char * fmt; 1947 char ** ap; 1948 { 1949 char * bp[MAXARG]; 1950 int i = 0; 1951 1952 while (*ap && i < MAXARG) 1953 bp[i++] = *ap++; 1954 fprintf(fp, fmt, bp[0], bp[1], bp[2], bp[3], 1955 bp[4], bp[5], bp[6], bp[7], 1956 bp[8], bp[9], bp[10], bp[11], 1957 bp[12], bp[13], bp[14], bp[15]); 1958 } 1959 1960 vsprintf(s, fmt, ap) 1961 char * s; 1962 char * fmt; 1963 char ** ap; 1964 { 1965 char * bp[MAXARG]; 1966 int i = 0; 1967 1968 while (*ap && i < MAXARG) 1969 bp[i++] = *ap++; 1970 sprintf(s, fmt, bp[0], bp[1], bp[2], bp[3], 1971 bp[4], bp[5], bp[6], bp[7], 1972 bp[8], bp[9], bp[10], bp[11], 1973 bp[12], bp[13], bp[14], bp[15]); 1974 } 1975 1976 #endif 1977 /* 1978 ** USERSHELLOK -- tell if a user's shell is ok for unrestricted use 1979 ** 1980 ** Parameters: 1981 ** shell -- the user's shell from /etc/passwd 1982 ** 1983 ** Returns: 1984 ** TRUE -- if it is ok to use this for unrestricted access. 1985 ** FALSE -- if the shell is restricted. 1986 */ 1987 1988 #if !HASGETUSERSHELL 1989 1990 # ifndef _PATH_SHELLS 1991 # define _PATH_SHELLS "/etc/shells" 1992 # endif 1993 1994 char *DefaultUserShells[] = 1995 { 1996 "/bin/sh", /* standard shell */ 1997 "/usr/bin/sh", 1998 "/bin/csh", /* C shell */ 1999 "/usr/bin/csh", 2000 #ifdef __hpux 2001 "/bin/rsh", /* restricted Bourne shell */ 2002 "/bin/ksh", /* Korn shell */ 2003 "/bin/rksh", /* restricted Korn shell */ 2004 "/bin/pam", 2005 "/usr/bin/keysh", /* key shell (extended Korn shell) */ 2006 "/bin/posix/sh", 2007 #endif 2008 #ifdef _AIX3 2009 "/bin/ksh", /* Korn shell */ 2010 "/usr/bin/ksh", 2011 "/bin/tsh", /* trusted shell */ 2012 "/usr/bin/tsh", 2013 "/bin/bsh", /* Bourne shell */ 2014 "/usr/bin/bsh", 2015 #endif 2016 NULL 2017 }; 2018 2019 #endif 2020 2021 #define WILDCARD_SHELL "/SENDMAIL/ANY/SHELL/" 2022 2023 bool 2024 usershellok(shell) 2025 char *shell; 2026 { 2027 #if HASGETUSERSHELL 2028 register char *p; 2029 extern char *getusershell(); 2030 2031 if (shell == NULL || shell[0] == '\0') 2032 return TRUE; 2033 2034 setusershell(); 2035 while ((p = getusershell()) != NULL) 2036 if (strcmp(p, shell) == 0 || strcmp(p, WILDCARD_SHELL) == 0) 2037 break; 2038 endusershell(); 2039 return p != NULL; 2040 #else 2041 register FILE *shellf; 2042 char buf[MAXLINE]; 2043 2044 if (shell == NULL || shell[0] == '\0') 2045 return TRUE; 2046 2047 shellf = fopen(_PATH_SHELLS, "r"); 2048 if (shellf == NULL) 2049 { 2050 /* no /etc/shells; see if it is one of the std shells */ 2051 char **d; 2052 2053 for (d = DefaultUserShells; *d != NULL; d++) 2054 { 2055 if (strcmp(shell, *d) == 0) 2056 return TRUE; 2057 } 2058 return FALSE; 2059 } 2060 2061 while (fgets(buf, sizeof buf, shellf) != NULL) 2062 { 2063 register char *p, *q; 2064 2065 p = buf; 2066 while (*p != '\0' && *p != '#' && *p != '/') 2067 p++; 2068 if (*p == '#' || *p == '\0') 2069 continue; 2070 q = p; 2071 while (*p != '\0' && *p != '#' && !isspace(*p)) 2072 p++; 2073 *p = '\0'; 2074 if (strcmp(shell, q) == 0 || strcmp(WILDCARD_SHELL, q) == 0) 2075 { 2076 fclose(shellf); 2077 return TRUE; 2078 } 2079 } 2080 fclose(shellf); 2081 return FALSE; 2082 #endif 2083 } 2084 /* 2085 ** FREESPACE -- see how much free space is on the queue filesystem 2086 ** 2087 ** Only implemented if you have statfs. 2088 ** 2089 ** Parameters: 2090 ** dir -- the directory in question. 2091 ** bsize -- a variable into which the filesystem 2092 ** block size is stored. 2093 ** 2094 ** Returns: 2095 ** The number of bytes free on the queue filesystem. 2096 ** -1 if the statfs call fails. 2097 ** 2098 ** Side effects: 2099 ** Puts the filesystem block size into bsize. 2100 */ 2101 2102 /* statfs types */ 2103 #define SFS_NONE 0 /* no statfs implementation */ 2104 #define SFS_USTAT 1 /* use ustat */ 2105 #define SFS_4ARGS 2 /* use four-argument statfs call */ 2106 #define SFS_VFS 3 /* use <sys/vfs.h> implementation */ 2107 #define SFS_MOUNT 4 /* use <sys/mount.h> implementation */ 2108 #define SFS_STATFS 5 /* use <sys/statfs.h> implementation */ 2109 #define SFS_STATVFS 6 /* use <sys/statvfs.h> implementation */ 2110 2111 #ifndef SFS_TYPE 2112 # define SFS_TYPE SFS_NONE 2113 #endif 2114 2115 #if SFS_TYPE == SFS_USTAT 2116 # include <ustat.h> 2117 #endif 2118 #if SFS_TYPE == SFS_4ARGS || SFS_TYPE == SFS_STATFS 2119 # include <sys/statfs.h> 2120 #endif 2121 #if SFS_TYPE == SFS_VFS 2122 # include <sys/vfs.h> 2123 #endif 2124 #if SFS_TYPE == SFS_MOUNT 2125 # include <sys/mount.h> 2126 #endif 2127 #if SFS_TYPE == SFS_STATVFS 2128 # include <sys/statvfs.h> 2129 #endif 2130 2131 long 2132 freespace(dir, bsize) 2133 char *dir; 2134 long *bsize; 2135 { 2136 #if SFS_TYPE != SFS_NONE 2137 # if SFS_TYPE == SFS_USTAT 2138 struct ustat fs; 2139 struct stat statbuf; 2140 # define FSBLOCKSIZE DEV_BSIZE 2141 # define SFS_BAVAIL f_tfree 2142 # else 2143 # if defined(ultrix) 2144 struct fs_data fs; 2145 # define SFS_BAVAIL fd_bfreen 2146 # define FSBLOCKSIZE 1024L 2147 # else 2148 # if SFS_TYPE == SFS_STATVFS 2149 struct statvfs fs; 2150 # define FSBLOCKSIZE fs.f_frsize 2151 # else 2152 struct statfs fs; 2153 # define FSBLOCKSIZE fs.f_bsize 2154 # endif 2155 # endif 2156 # endif 2157 # ifndef SFS_BAVAIL 2158 # define SFS_BAVAIL f_bavail 2159 # endif 2160 2161 # if SFS_TYPE == SFS_USTAT 2162 if (stat(dir, &statbuf) == 0 && ustat(statbuf.st_dev, &fs) == 0) 2163 # else 2164 # if SFS_TYPE == SFS_4ARGS 2165 if (statfs(dir, &fs, sizeof fs, 0) == 0) 2166 # else 2167 # if SFS_TYPE == SFS_STATVFS 2168 if (statvfs(dir, &fs) == 0) 2169 # else 2170 # if defined(ultrix) 2171 if (statfs(dir, &fs) > 0) 2172 # else 2173 if (statfs(dir, &fs) == 0) 2174 # endif 2175 # endif 2176 # endif 2177 # endif 2178 { 2179 if (bsize != NULL) 2180 *bsize = FSBLOCKSIZE; 2181 return (fs.SFS_BAVAIL); 2182 } 2183 #endif 2184 return (-1); 2185 } 2186 /* 2187 ** ENOUGHSPACE -- check to see if there is enough free space on the queue fs 2188 ** 2189 ** Only implemented if you have statfs. 2190 ** 2191 ** Parameters: 2192 ** msize -- the size to check against. If zero, we don't yet 2193 ** know how big the message will be, so just check for 2194 ** a "reasonable" amount. 2195 ** 2196 ** Returns: 2197 ** TRUE if there is enough space. 2198 ** FALSE otherwise. 2199 */ 2200 2201 bool 2202 enoughspace(msize) 2203 long msize; 2204 { 2205 long bfree, bsize; 2206 2207 if (MinBlocksFree <= 0 && msize <= 0) 2208 { 2209 if (tTd(4, 80)) 2210 printf("enoughspace: no threshold\n"); 2211 return TRUE; 2212 } 2213 2214 if ((bfree = freespace(QueueDir, &bsize)) >= 0) 2215 { 2216 if (tTd(4, 80)) 2217 printf("enoughspace: bavail=%ld, need=%ld\n", 2218 bfree, msize); 2219 2220 /* convert msize to block count */ 2221 msize = msize / bsize + 1; 2222 if (MinBlocksFree >= 0) 2223 msize += MinBlocksFree; 2224 2225 if (bfree < msize) 2226 { 2227 #ifdef LOG 2228 if (LogLevel > 0) 2229 syslog(LOG_ALERT, 2230 "%s: low on space (have %ld, %s needs %ld in %s)", 2231 CurEnv->e_id == NULL ? "[NOQUEUE]" : CurEnv->e_id, 2232 bfree, 2233 CurHostName == NULL ? "SMTP-DAEMON" : CurHostName, 2234 msize, QueueDir); 2235 #endif 2236 return FALSE; 2237 } 2238 } 2239 else if (tTd(4, 80)) 2240 printf("enoughspace failure: min=%ld, need=%ld: %s\n", 2241 MinBlocksFree, msize, errstring(errno)); 2242 return TRUE; 2243 } 2244 /* 2245 ** TRANSIENTERROR -- tell if an error code indicates a transient failure 2246 ** 2247 ** This looks at an errno value and tells if this is likely to 2248 ** go away if retried later. 2249 ** 2250 ** Parameters: 2251 ** err -- the errno code to classify. 2252 ** 2253 ** Returns: 2254 ** TRUE if this is probably transient. 2255 ** FALSE otherwise. 2256 */ 2257 2258 bool 2259 transienterror(err) 2260 int err; 2261 { 2262 switch (err) 2263 { 2264 case EIO: /* I/O error */ 2265 case ENXIO: /* Device not configured */ 2266 case EAGAIN: /* Resource temporarily unavailable */ 2267 case ENOMEM: /* Cannot allocate memory */ 2268 case ENODEV: /* Operation not supported by device */ 2269 case ENFILE: /* Too many open files in system */ 2270 case EMFILE: /* Too many open files */ 2271 case ENOSPC: /* No space left on device */ 2272 #ifdef ETIMEDOUT 2273 case ETIMEDOUT: /* Connection timed out */ 2274 #endif 2275 #ifdef ESTALE 2276 case ESTALE: /* Stale NFS file handle */ 2277 #endif 2278 #ifdef ENETDOWN 2279 case ENETDOWN: /* Network is down */ 2280 #endif 2281 #ifdef ENETUNREACH 2282 case ENETUNREACH: /* Network is unreachable */ 2283 #endif 2284 #ifdef ENETRESET 2285 case ENETRESET: /* Network dropped connection on reset */ 2286 #endif 2287 #ifdef ECONNABORTED 2288 case ECONNABORTED: /* Software caused connection abort */ 2289 #endif 2290 #ifdef ECONNRESET 2291 case ECONNRESET: /* Connection reset by peer */ 2292 #endif 2293 #ifdef ENOBUFS 2294 case ENOBUFS: /* No buffer space available */ 2295 #endif 2296 #ifdef ESHUTDOWN 2297 case ESHUTDOWN: /* Can't send after socket shutdown */ 2298 #endif 2299 #ifdef ECONNREFUSED 2300 case ECONNREFUSED: /* Connection refused */ 2301 #endif 2302 #ifdef EHOSTDOWN 2303 case EHOSTDOWN: /* Host is down */ 2304 #endif 2305 #ifdef EHOSTUNREACH 2306 case EHOSTUNREACH: /* No route to host */ 2307 #endif 2308 #ifdef EDQUOT 2309 case EDQUOT: /* Disc quota exceeded */ 2310 #endif 2311 #ifdef EPROCLIM 2312 case EPROCLIM: /* Too many processes */ 2313 #endif 2314 #ifdef EUSERS 2315 case EUSERS: /* Too many users */ 2316 #endif 2317 #ifdef EDEADLK 2318 case EDEADLK: /* Resource deadlock avoided */ 2319 #endif 2320 #ifdef EISCONN 2321 case EISCONN: /* Socket already connected */ 2322 #endif 2323 #ifdef EINPROGRESS 2324 case EINPROGRESS: /* Operation now in progress */ 2325 #endif 2326 #ifdef EALREADY 2327 case EALREADY: /* Operation already in progress */ 2328 #endif 2329 #ifdef EADDRINUSE 2330 case EADDRINUSE: /* Address already in use */ 2331 #endif 2332 #ifdef EADDRNOTAVAIL 2333 case EADDRNOTAVAIL: /* Can't assign requested address */ 2334 #endif 2335 #ifdef ETXTBSY 2336 case ETXTBSY: /* (Apollo) file locked */ 2337 #endif 2338 #if defined(ENOSR) && (!defined(ENOBUFS) || (ENOBUFS != ENOSR)) 2339 case ENOSR: /* Out of streams resources */ 2340 #endif 2341 return TRUE; 2342 } 2343 2344 /* nope, must be permanent */ 2345 return FALSE; 2346 } 2347 /* 2348 ** LOCKFILE -- lock a file using flock or (shudder) fcntl locking 2349 ** 2350 ** Parameters: 2351 ** fd -- the file descriptor of the file. 2352 ** filename -- the file name (for error messages). 2353 ** ext -- the filename extension. 2354 ** type -- type of the lock. Bits can be: 2355 ** LOCK_EX -- exclusive lock. 2356 ** LOCK_NB -- non-blocking. 2357 ** 2358 ** Returns: 2359 ** TRUE if the lock was acquired. 2360 ** FALSE otherwise. 2361 */ 2362 2363 bool 2364 lockfile(fd, filename, ext, type) 2365 int fd; 2366 char *filename; 2367 char *ext; 2368 int type; 2369 { 2370 # if !HASFLOCK 2371 int action; 2372 struct flock lfd; 2373 2374 if (ext == NULL) 2375 ext = ""; 2376 2377 bzero(&lfd, sizeof lfd); 2378 if (bitset(LOCK_UN, type)) 2379 lfd.l_type = F_UNLCK; 2380 else if (bitset(LOCK_EX, type)) 2381 lfd.l_type = F_WRLCK; 2382 else 2383 lfd.l_type = F_RDLCK; 2384 2385 if (bitset(LOCK_NB, type)) 2386 action = F_SETLK; 2387 else 2388 action = F_SETLKW; 2389 2390 if (tTd(55, 60)) 2391 printf("lockfile(%s%s, action=%d, type=%d): ", 2392 filename, ext, action, lfd.l_type); 2393 2394 if (fcntl(fd, action, &lfd) >= 0) 2395 { 2396 if (tTd(55, 60)) 2397 printf("SUCCESS\n"); 2398 return TRUE; 2399 } 2400 2401 if (tTd(55, 60)) 2402 printf("(%s) ", errstring(errno)); 2403 2404 /* 2405 ** On SunOS, if you are testing using -oQ/tmp/mqueue or 2406 ** -oA/tmp/aliases or anything like that, and /tmp is mounted 2407 ** as type "tmp" (that is, served from swap space), the 2408 ** previous fcntl will fail with "Invalid argument" errors. 2409 ** Since this is fairly common during testing, we will assume 2410 ** that this indicates that the lock is successfully grabbed. 2411 */ 2412 2413 if (errno == EINVAL) 2414 { 2415 if (tTd(55, 60)) 2416 printf("SUCCESS\n"); 2417 return TRUE; 2418 } 2419 2420 if (!bitset(LOCK_NB, type) || (errno != EACCES && errno != EAGAIN)) 2421 { 2422 int omode = -1; 2423 # ifdef F_GETFL 2424 int oerrno = errno; 2425 2426 (void) fcntl(fd, F_GETFL, &omode); 2427 errno = oerrno; 2428 # endif 2429 syserr("cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 2430 filename, ext, fd, type, omode, geteuid()); 2431 } 2432 # else 2433 if (ext == NULL) 2434 ext = ""; 2435 2436 if (tTd(55, 60)) 2437 printf("lockfile(%s%s, type=%o): ", filename, ext, type); 2438 2439 if (flock(fd, type) >= 0) 2440 { 2441 if (tTd(55, 60)) 2442 printf("SUCCESS\n"); 2443 return TRUE; 2444 } 2445 2446 if (tTd(55, 60)) 2447 printf("(%s) ", errstring(errno)); 2448 2449 if (!bitset(LOCK_NB, type) || errno != EWOULDBLOCK) 2450 { 2451 int omode = -1; 2452 # ifdef F_GETFL 2453 int oerrno = errno; 2454 2455 (void) fcntl(fd, F_GETFL, &omode); 2456 errno = oerrno; 2457 # endif 2458 syserr("cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 2459 filename, ext, fd, type, omode, geteuid()); 2460 } 2461 # endif 2462 if (tTd(55, 60)) 2463 printf("FAIL\n"); 2464 return FALSE; 2465 } 2466 /* 2467 ** CHOWNSAFE -- tell if chown is "safe" (executable only by root) 2468 ** 2469 ** Parameters: 2470 ** fd -- the file descriptor to check. 2471 ** 2472 ** Returns: 2473 ** TRUE -- if only root can chown the file to an arbitrary 2474 ** user. 2475 ** FALSE -- if an arbitrary user can give away a file. 2476 */ 2477 2478 bool 2479 chownsafe(fd) 2480 int fd; 2481 { 2482 #ifdef __hpux 2483 char *s; 2484 int tfd; 2485 uid_t o_uid, o_euid; 2486 gid_t o_gid, o_egid; 2487 bool rval; 2488 struct stat stbuf; 2489 2490 o_uid = getuid(); 2491 o_euid = geteuid(); 2492 o_gid = getgid(); 2493 o_egid = getegid(); 2494 fstat(fd, &stbuf); 2495 setresuid(stbuf.st_uid, stbuf.st_uid, -1); 2496 setresgid(stbuf.st_gid, stbuf.st_gid, -1); 2497 s = tmpnam(NULL); 2498 tfd = open(s, O_RDONLY|O_CREAT, 0600); 2499 rval = fchown(tfd, DefUid, DefGid) != 0; 2500 close(tfd); 2501 unlink(s); 2502 setreuid(o_uid, o_euid); 2503 setresgid(o_gid, o_egid, -1); 2504 return rval; 2505 #else 2506 # ifdef _POSIX_CHOWN_RESTRICTED 2507 # if _POSIX_CHOWN_RESTRICTED == -1 2508 return FALSE; 2509 # else 2510 return TRUE; 2511 # endif 2512 # else 2513 # ifdef _PC_CHOWN_RESTRICTED 2514 int rval; 2515 2516 /* 2517 ** Some systems (e.g., SunOS) seem to have the call and the 2518 ** #define _PC_CHOWN_RESTRICTED, but don't actually implement 2519 ** the call. This heuristic checks for that. 2520 */ 2521 2522 errno = 0; 2523 rval = fpathconf(fd, _PC_CHOWN_RESTRICTED); 2524 if (errno == 0) 2525 return rval > 0; 2526 # endif 2527 # ifdef BSD 2528 return TRUE; 2529 # else 2530 return FALSE; 2531 # endif 2532 # endif 2533 #endif 2534 } 2535 /* 2536 ** RESETLIMITS -- reset system controlled resource limits 2537 ** 2538 ** This is to avoid denial-of-service attacks 2539 ** 2540 ** Parameters: 2541 ** none 2542 ** 2543 ** Returns: 2544 ** none 2545 */ 2546 2547 #if HASSETRLIMIT 2548 # include <sys/resource.h> 2549 #endif 2550 2551 void 2552 resetlimits() 2553 { 2554 #if HASSETRLIMIT 2555 struct rlimit lim; 2556 2557 lim.rlim_cur = lim.rlim_max = RLIM_INFINITY; 2558 (void) setrlimit(RLIMIT_CPU, &lim); 2559 (void) setrlimit(RLIMIT_FSIZE, &lim); 2560 #else 2561 # if HASULIMIT 2562 (void) ulimit(2, 0x3fffff); 2563 # endif 2564 #endif 2565 } 2566 /* 2567 ** GETCFNAME -- return the name of the .cf file. 2568 ** 2569 ** Some systems (e.g., NeXT) determine this dynamically. 2570 */ 2571 2572 char * 2573 getcfname() 2574 { 2575 if (ConfFile != NULL) 2576 return ConfFile; 2577 #ifdef NETINFO 2578 { 2579 extern char *ni_propval(); 2580 char *cflocation; 2581 2582 cflocation = ni_propval("/locations", NULL, "sendmail", 2583 "sendmail.cf", '\0'); 2584 if (cflocation != NULL) 2585 return cflocation; 2586 } 2587 #endif 2588 return _PATH_SENDMAILCF; 2589 } 2590 /* 2591 ** SETVENDOR -- process vendor code from V configuration line 2592 ** 2593 ** Parameters: 2594 ** vendor -- string representation of vendor. 2595 ** 2596 ** Returns: 2597 ** TRUE -- if ok. 2598 ** FALSE -- if vendor code could not be processed. 2599 ** 2600 ** Side Effects: 2601 ** It is reasonable to set mode flags here to tweak 2602 ** processing in other parts of the code if necessary. 2603 ** For example, if you are a vendor that uses $%y to 2604 ** indicate YP lookups, you could enable that here. 2605 */ 2606 2607 bool 2608 setvendor(vendor) 2609 char *vendor; 2610 { 2611 if (strcasecmp(vendor, "Berkeley") == 0) 2612 { 2613 VendorCode = VENDOR_BERKELEY; 2614 return TRUE; 2615 } 2616 2617 /* add vendor extensions here */ 2618 2619 #ifdef SUN_EXTENSIONS 2620 if (strcasecmp(vendor, "Sun") == 0) 2621 { 2622 VendorCode = VENDOR_SUN; 2623 return TRUE; 2624 } 2625 #endif 2626 2627 return FALSE; 2628 } 2629 /* 2630 ** STRTOL -- convert string to long integer 2631 ** 2632 ** For systems that don't have it in the C library. 2633 ** 2634 ** This is taken verbatim from the 4.4-Lite C library. 2635 */ 2636 2637 #ifdef NEEDSTRTOL 2638 2639 #if defined(LIBC_SCCS) && !defined(lint) 2640 static char sccsid[] = "@(#)strtol.c 8.1 (Berkeley) 6/4/93"; 2641 #endif /* LIBC_SCCS and not lint */ 2642 2643 #include <limits.h> 2644 2645 /* 2646 * Convert a string to a long integer. 2647 * 2648 * Ignores `locale' stuff. Assumes that the upper and lower case 2649 * alphabets and digits are each contiguous. 2650 */ 2651 2652 long 2653 strtol(nptr, endptr, base) 2654 const char *nptr; 2655 char **endptr; 2656 register int base; 2657 { 2658 register const char *s = nptr; 2659 register unsigned long acc; 2660 register int c; 2661 register unsigned long cutoff; 2662 register int neg = 0, any, cutlim; 2663 2664 /* 2665 * Skip white space and pick up leading +/- sign if any. 2666 * If base is 0, allow 0x for hex and 0 for octal, else 2667 * assume decimal; if base is already 16, allow 0x. 2668 */ 2669 do { 2670 c = *s++; 2671 } while (isspace(c)); 2672 if (c == '-') { 2673 neg = 1; 2674 c = *s++; 2675 } else if (c == '+') 2676 c = *s++; 2677 if ((base == 0 || base == 16) && 2678 c == '0' && (*s == 'x' || *s == 'X')) { 2679 c = s[1]; 2680 s += 2; 2681 base = 16; 2682 } 2683 if (base == 0) 2684 base = c == '0' ? 8 : 10; 2685 2686 /* 2687 * Compute the cutoff value between legal numbers and illegal 2688 * numbers. That is the largest legal value, divided by the 2689 * base. An input number that is greater than this value, if 2690 * followed by a legal input character, is too big. One that 2691 * is equal to this value may be valid or not; the limit 2692 * between valid and invalid numbers is then based on the last 2693 * digit. For instance, if the range for longs is 2694 * [-2147483648..2147483647] and the input base is 10, 2695 * cutoff will be set to 214748364 and cutlim to either 2696 * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated 2697 * a value > 214748364, or equal but the next digit is > 7 (or 8), 2698 * the number is too big, and we will return a range error. 2699 * 2700 * Set any if any `digits' consumed; make it negative to indicate 2701 * overflow. 2702 */ 2703 cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX; 2704 cutlim = cutoff % (unsigned long)base; 2705 cutoff /= (unsigned long)base; 2706 for (acc = 0, any = 0;; c = *s++) { 2707 if (isdigit(c)) 2708 c -= '0'; 2709 else if (isalpha(c)) 2710 c -= isupper(c) ? 'A' - 10 : 'a' - 10; 2711 else 2712 break; 2713 if (c >= base) 2714 break; 2715 if (any < 0 || acc > cutoff || acc == cutoff && c > cutlim) 2716 any = -1; 2717 else { 2718 any = 1; 2719 acc *= base; 2720 acc += c; 2721 } 2722 } 2723 if (any < 0) { 2724 acc = neg ? LONG_MIN : LONG_MAX; 2725 errno = ERANGE; 2726 } else if (neg) 2727 acc = -acc; 2728 if (endptr != 0) 2729 *endptr = (char *)(any ? s - 1 : nptr); 2730 return (acc); 2731 } 2732 2733 #endif 2734 /* 2735 ** SM_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 2736 ** 2737 ** Some operating systems have wierd problems with the gethostbyXXX 2738 ** routines. For example, Solaris versions at least through 2.3 2739 ** don't properly deliver a canonical h_name field. This tries to 2740 ** work around these problems. 2741 */ 2742 2743 struct hostent * 2744 sm_gethostbyname(name) 2745 const char *name; 2746 { 2747 #if defined(SOLARIS) && SOLARIS < 204 2748 extern int h_errno; 2749 2750 # if SOLARIS == 203 2751 static struct hostent hp; 2752 static char buf[1000]; 2753 extern struct hostent *_switch_gethostbyname_r(); 2754 2755 return _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 2756 # else 2757 extern struct hostent *__switch_gethostbyname(); 2758 2759 return __switch_gethostbyname(name); 2760 # endif 2761 #else 2762 return gethostbyname(name); 2763 #endif 2764 } 2765 2766 struct hostent * 2767 sm_gethostbyaddr(addr, len, type) 2768 const char *addr; 2769 int len; 2770 int type; 2771 { 2772 #if defined(SOLARIS) && SOLARIS < 204 2773 extern int h_errno; 2774 2775 # if SOLARIS == 203 2776 static struct hostent hp; 2777 static char buf[1000]; 2778 extern struct hostent *_switch_gethostbyaddr_r(); 2779 2780 return _switch_gethostbyaddr_r(addr, len, type, &hp, buf, sizeof(buf), &h_errno); 2781 # else 2782 extern struct hostent *__switch_gethostbyaddr(); 2783 2784 return __switch_gethostbyaddr(addr, len, type); 2785 # endif 2786 #else 2787 return gethostbyaddr(addr, len, type); 2788 #endif 2789 } 2790 /* 2791 ** SM_GETPW{NAM,UID} -- wrapper for getpwnam and getpwuid 2792 */ 2793 2794 struct passwd * 2795 sm_getpwnam(user) 2796 char *user; 2797 { 2798 return getpwnam(user); 2799 } 2800 2801 struct passwd * 2802 sm_getpwuid(uid) 2803 uid_t uid; 2804 { 2805 return getpwuid(uid); 2806 } 2807 /* 2808 ** NI_PROPVAL -- netinfo property value lookup routine 2809 ** 2810 ** Parameters: 2811 ** keydir -- the Netinfo directory name in which to search 2812 ** for the key. 2813 ** keyprop -- the name of the property in which to find the 2814 ** property we are interested. Defaults to "name". 2815 ** keyval -- the value for which we are really searching. 2816 ** valprop -- the property name for the value in which we 2817 ** are interested. 2818 ** sepchar -- if non-nil, this can be multiple-valued, and 2819 ** we should return a string separated by this 2820 ** character. 2821 ** 2822 ** Returns: 2823 ** NULL -- if: 2824 ** 1. the directory is not found 2825 ** 2. the property name is not found 2826 ** 3. the property contains multiple values 2827 ** 4. some error occured 2828 ** else -- the location of the config file. 2829 ** 2830 ** Example: 2831 ** To search for an alias value, use: 2832 ** ni_propval("/aliases", "name", aliasname, "members", ',') 2833 ** 2834 ** Notes: 2835 ** Caller should free the return value of ni_proval 2836 */ 2837 2838 #ifdef NETINFO 2839 2840 # include <netinfo/ni.h> 2841 2842 # define LOCAL_NETINFO_DOMAIN "." 2843 # define PARENT_NETINFO_DOMAIN ".." 2844 # define MAX_NI_LEVELS 256 2845 2846 char * 2847 ni_propval(keydir, keyprop, keyval, valprop, sepchar) 2848 char *keydir; 2849 char *keyprop; 2850 char *keyval; 2851 char *valprop; 2852 char sepchar; 2853 { 2854 char *propval = NULL; 2855 int i; 2856 int j, alen; 2857 void *ni = NULL; 2858 void *lastni = NULL; 2859 ni_status nis; 2860 ni_id nid; 2861 ni_namelist ninl; 2862 register char *p; 2863 char keybuf[1024]; 2864 2865 /* 2866 ** Create the full key from the two parts. 2867 ** 2868 ** Note that directory can end with, e.g., "name=" to specify 2869 ** an alternate search property. 2870 */ 2871 2872 i = strlen(keydir) + strlen(keyval) + 2; 2873 if (keyprop != NULL) 2874 i += strlen(keyprop) + 1; 2875 if (i > sizeof keybuf) 2876 return NULL; 2877 strcpy(keybuf, keydir); 2878 strcat(keybuf, "/"); 2879 if (keyprop != NULL) 2880 { 2881 strcat(keybuf, keyprop); 2882 strcat(keybuf, "="); 2883 } 2884 strcat(keybuf, keyval); 2885 2886 /* 2887 ** If the passed directory and property name are found 2888 ** in one of netinfo domains we need to search (starting 2889 ** from the local domain moving all the way back to the 2890 ** root domain) set propval to the property's value 2891 ** and return it. 2892 */ 2893 2894 for (i = 0; i < MAX_NI_LEVELS; ++i) 2895 { 2896 if (i == 0) 2897 { 2898 nis = ni_open(NULL, LOCAL_NETINFO_DOMAIN, &ni); 2899 } 2900 else 2901 { 2902 if (lastni != NULL) 2903 ni_free(lastni); 2904 lastni = ni; 2905 nis = ni_open(lastni, PARENT_NETINFO_DOMAIN, &ni); 2906 } 2907 2908 /* 2909 ** Don't bother if we didn't get a handle on a 2910 ** proper domain. This is not necessarily an error. 2911 ** We would get a positive ni_status if, for instance 2912 ** we never found the directory or property and tried 2913 ** to open the parent of the root domain! 2914 */ 2915 2916 if (nis != 0) 2917 break; 2918 2919 /* 2920 ** Find the path to the server information. 2921 */ 2922 2923 if (ni_pathsearch(ni, &nid, keybuf) != 0) 2924 continue; 2925 2926 /* 2927 ** Find associated value information. 2928 */ 2929 2930 if (ni_lookupprop(ni, &nid, valprop, &ninl) != 0) 2931 continue; 2932 2933 /* 2934 ** See if we have an acceptable number of values. 2935 */ 2936 2937 if (ninl.ni_namelist_len <= 0) 2938 continue; 2939 2940 if (sepchar == '\0' && ninl.ni_namelist_len > 1) 2941 { 2942 ni_namelist_free(&ninl); 2943 continue; 2944 } 2945 2946 /* 2947 ** Calculate number of bytes needed and build result 2948 */ 2949 2950 alen = 1; 2951 for (j = 0; j < ninl.ni_namelist_len; j++) 2952 alen += strlen(ninl.ni_namelist_val[j]) + 1; 2953 propval = p = xalloc(alen); 2954 for (j = 0; j < ninl.ni_namelist_len; j++) 2955 { 2956 strcpy(p, ninl.ni_namelist_val[j]); 2957 p += strlen(p); 2958 *p++ = sepchar; 2959 } 2960 *--p = '\0'; 2961 2962 ni_namelist_free(&ninl); 2963 } 2964 2965 /* 2966 ** Clean up. 2967 */ 2968 2969 if (ni != NULL) 2970 ni_free(ni); 2971 if (lastni != NULL && ni != lastni) 2972 ni_free(lastni); 2973 2974 return propval; 2975 } 2976 2977 #endif /* NETINFO */ 2978 /* 2979 ** HARD_SYSLOG -- call syslog repeatedly until it works 2980 ** 2981 ** Needed on HP-UX, which apparently doesn't guarantee that 2982 ** syslog succeeds during interrupt handlers. 2983 */ 2984 2985 #ifdef __hpux 2986 2987 # define MAXSYSLOGTRIES 100 2988 # undef syslog 2989 2990 # ifdef __STDC__ 2991 hard_syslog(int pri, char *msg, ...) 2992 # else 2993 hard_syslog(pri, msg, va_alist) 2994 int pri; 2995 char *msg; 2996 va_dcl 2997 # endif 2998 { 2999 int i; 3000 char buf[SYSLOG_BUFSIZE * 2]; 3001 VA_LOCAL_DECL; 3002 3003 VA_START(msg); 3004 vsprintf(buf, msg, ap); 3005 VA_END; 3006 3007 for (i = MAXSYSLOGTRIES; --i >= 0 && syslog(pri, "%s", buf) < 0; ) 3008 continue; 3009 } 3010 3011 #endif 3012 /* 3013 ** LOCAL_HOSTNAME_LENGTH 3014 ** 3015 ** This is required to get sendmail to compile against BIND 4.9.x 3016 ** on Ultrix. 3017 */ 3018 3019 #if defined(ultrix) && NAMED_BIND 3020 3021 # include <resolv.h> 3022 # if __RES >= 19931104 3023 3024 int 3025 local_hostname_length(hostname) 3026 char *hostname; 3027 { 3028 int len_host, len_domain; 3029 3030 if (!*_res.defdname) 3031 res_init(); 3032 len_host = strlen(hostname); 3033 len_domain = strlen(_res.defdname); 3034 if (len_host > len_domain && 3035 (strcasecmp(hostname + len_host - len_domain,_res.defdname) == 0) && 3036 hostname[len_host - len_domain - 1] == '.') 3037 return len_host - len_domain - 1; 3038 else 3039 return 0; 3040 } 3041 3042 # endif 3043 #endif 3044